It's possible that the they are adding these records because MyHeritage suggests a relationship and offers to add matches, including a profile photo and the rest of their information. I've had that happen with my own tree in Geni. MyHeritage found a match there and offered to add it to the tree in MyHeritage from the Geni tree. it obviously doesn't know (or care) that I created the Geni entries. It saved me time not having to add them manually to 2 sites.
