Weird occurrence

[Ritz00]

Literally a few minutes ago, my phone suddenly added contacts that are from my moms phone. Only way I noticed that, is because my moms contact was changed to her first name when I had it something different.

What do I do to fix this? Would deleting all the added contacts just be the better option? Also, I haven't noticed anything else thats different.

 

[Hadron]

Do you share any accounts? Because the most likely reason for something like that is because one of you has an account on the other phone.

If you look at these extra contacts you should be able to see what account they are associated with. That would be the first thing I'd check, what is different about them.