Thanks for helping me. As luck would have it after I did manage to merge by using the search function within FTMM-2 for Mac, I then got the error message Family Tree Maker is Updating This Tree
The tree "NAME OF MY TREE" is unavailable while it is being updated by Family Tree Maker. Other trees may be available while this is happening."
So, now my tree appears to be messed up. I"m traveling now but will reply late this weekend to see if I can describe my problem carefully enough for you to reproduce it as you suggested.