Indeed,I remember when Fred Gee’s wife Edna died in a fire at the warehouse that used to be in Coronation Street Ivy saying to someone that she and Fred had no children “only each other just like me and my Jack”!!
To confuse things even further. In 1972, Ivy initially referred to her husband as Arthur, then Wilf, before becoming Jack in 1975 and finally Bert in 1979.
Corriepedia has tried to explain this confusing continuity.