Import of attributes and attribute values leads to duplicate content

[wucherpfennig]

Hi

I found another issue where I would appreciate to get some clarification on:

after importing attributes without any error I do an import of the attribute values - works ok!

after repeating those steps (there might be some changes?) there are duplicates in the attribute values (always the last one) and some (random?) attributes could not be found.

Do you have any idea?