I cannot be sure on the timeline to be able to answer your question so I won't surmise about it. I do know that there is something wrong with the milestone because they got some just fine, then this happened where it was awarded with no apparent reason, and ever since that happened, further milestones are making the toddler glow and the parents are cheering but no milestone is being awarded. And it keeps happening I have noticed, since I made this post.
I did reinstall mccc so that my family could be back together again and can't remove it because I will lose someone. So I guess I will have to split the family again and remove it and I will probably reinstall the game as well so I don't have to wonder if mccc is causing the problem in some way. My apologies for wasting your time before I did so. It has just been so nice to have them back together but I should have known better.
There is a known general issue with toddler/infant milestones. The thread is here: [GRO] Infant/Toddler wont achieve milestones | EA Forums - 5053288
That's probably what you are seeing now. Don't think there's report for the invite problem.
