diff --git a/gramps/gen/lib/date.py b/gramps/gen/lib/date.py
index 24fb740a4..23e4e5b78 100644
--- a/gramps/gen/lib/date.py
+++ b/gramps/gen/lib/date.py
@@ -1328,6 +1328,36 @@ class Date(object):
         if day != 0 or dv[Date._POS_DAY] > 28:
             self.set_yr_mon_day(*self.offset(day))
 
+    def set2_yr_mon_day_offset(self, year=0, month=0, day=0):
+        """
+        Set the year, month, and day values by offset.
+        """
+        dv = list(self.dateval)
+        if dv[Date._POS_RYR]:
+            dv[Date._POS_RYR] += year
+        elif year:
+            dv[Date._POS_RYR] = year
+        if dv[Date._POS_RMON]:
+            dv[Date._POS_RMON] += month
+        elif month:
+            if month < 0:
+                dv[Date._POS_RMON] = 1 + month
+            else:
+                dv[Date._POS_RMON] = month
+        # Fix if month out of bounds:
+        if month != 0: # only check if changed
+            if dv[Date._POS_RMON] == 0: # subtraction
+                dv[Date._POS_RMON] = 12
+                dv[Date._POS_RYR] -= 1
+            elif dv[Date._POS_RMON] < 0: # subtraction
+                dv[Date._POS_RYR] -= int((-dv[Date._POS_RMON]) / 12) + 1
+                dv[Date._POS_RMON] = (dv[Date._POS_RMON] % 12)
+            elif dv[Date._POS_RMON] > 12 or dv[Date._POS_RMON] < 1:
+                dv[Date._POS_RYR] += int(dv[Date._POS_RMON] / 12)
+                dv[Date._POS_RMON] = dv[Date._POS_RMON] % 12
+        if day != 0 or dv[Date._POS_RDAY] > 28:
+            self.set2_yr_mon_day(*self.offset(day))
+
     def copy_offset_ymd(self, year=0, month=0, day=0):
         """
         Return a Date copy based on year, month, and day offset.
@@ -1339,6 +1369,9 @@ class Date(object):
             new_date = self
         retval = Date(new_date)
         retval.set_yr_mon_day_offset(year, month, day)
+        if (self.get_modifier() == Date.MOD_RANGE or 
+            self.get_modifier() == Date.MOD_SPAN): 
+            retval.set2_yr_mon_day_offset(year, month, day)
         if orig_cal == 0:
             return retval
         else:
@@ -1351,6 +1384,9 @@ class Date(object):
         """
         retval = Date(self)
         retval.set_yr_mon_day(year, month, day)
+        if (self.get_modifier() == Date.MOD_RANGE or 
+            self.get_modifier() == Date.MOD_SPAN): 
+            retval.set2_yr_mon_day_offset(year, month, day)
         return retval
 
     def set_year(self, year):
diff --git a/gramps/gen/utils/alive.py b/gramps/gen/utils/alive.py
index ad3fc4af9..65b9e5d2f 100644
--- a/gramps/gen/utils/alive.py
+++ b/gramps/gen/utils/alive.py
@@ -102,16 +102,17 @@ class ProbablyAlive(object):
         death_date = None
         birth_date = None
         explain = ""
-
+        # If the recorded death year is before current year then
+        # things are simple.
         if death_ref and death_ref.get_role().is_primary():
             if death_ref:
                 death = self.db.get_event_from_handle(death_ref.ref)
-                if death and death.get_date_object().is_valid():
-                    death_date = death.get_date_object()
-                elif death: # has a death event, but it is no valid:
-                    death_date = Today() # before today
-                    death_date.set_modifier(Date.MOD_BEFORE)
-                    explain = _("death event without date")
+                if death:
+                    if death.get_date_object().is_valid():
+                        death_date = death.get_date_object()
+                    else: # has a death event, but it is not valid:
+                        death_date = Today() # before today
+                        death_date.set_modifier(Date.MOD_BEFORE)
 
         # Look for Cause Of Death, Burial or Cremation events.
         # These are fairly good indications that someone's not alive.
@@ -121,12 +122,9 @@ class ProbablyAlive(object):
                     ev = self.db.get_event_from_handle(ev_ref.ref)
                     if ev and ev.type.is_death_fallback():
                         death_date = ev.get_date_object()
-                        if death_date.is_valid():
-                            explain = _("death-related evidence")
-                        else:
+                        if not death_date.is_valid():
                             death_date = Today() # before today
                             death_date.set_modifier(Date.MOD_BEFORE)
-                            explain = _("death-related evidence without date")
 
         # If they were born within X years before current year then
         # assume they are alive (we already know they are not dead).
@@ -143,7 +141,6 @@ class ProbablyAlive(object):
                 ev = self.db.get_event_from_handle(ev_ref.ref)
                 if ev and ev.type.is_birth_fallback():
                     birth_date = ev.get_date_object()
-                    explain = _("birth-related evidence")
 
         if not birth_date and death_date:
             # person died more than MAX after current year
@@ -488,23 +485,23 @@ def probably_alive(person, db,
     """
     # First, get the real database to use all people
     # for determining alive status:
-    basedb = db.basedb
-    # Now, we create a wrapper for doing work:
-    pb = ProbablyAlive(basedb, max_sib_age_diff, 
-                       max_age_prob_alive, 
-                       avg_generation_gap)
-    birth, death, explain, relative = pb.probably_alive_range(person)
+    birth, death, explain, relative = probably_alive_range(person, db,
+            max_sib_age_diff, max_age_prob_alive, avg_generation_gap)
     if current_date is None:
         current_date = Today()
+    LOG.debug("{}: b.{}, d.{} - {}".format(
+        " ".join(person.get_primary_name().get_text_data_list()),
+        birth, death, explain))
     if not birth or not death:
         # no evidence, must consider alive
-        return (True, None, None, _("no evidence"), None)
+        return ((True, None, None, _("no evidence"), None) if return_range 
+                else True)
     # must have dates from here:
     if limit:
         death += limit # add these years to death
     # Finally, check to see if current_date is between dates
     result = (current_date.match(birth, ">=") and 
-              current_date.match(death, "<<"))
+              current_date.match(death, "<="))
     if return_range:
         return (result, birth, death, explain, relative)
     else: