Double name in entities list?

[FreeFall]

So, I've finally managed to export my meshes and make them properly work in the editor (hooray!) But for some reason I got doubles of all names in the entities list.. removing the files in question makes the names go away, and re-exporting them brings back the doubles again..

Anybody knows how to fix this?.. It not really harmful level wise as far as I can see, but it's kinda annoying because the list of entities is growing crazy fast this way!

A picture of the problem ;


Thanks in advance!