This has to be a bug. I have spent the last 30 minutes trying different combinations to import the file such as messing with the "import kind" and "dimensions". The whole time I have been right clicking on my bin and selecting Import in the drop-down menu. Once I just dragged the illustrator file into the bin it then worked. Problem solved for today...but what happens when I back up the files and need to reconnect?
I'll bet that the import as a sequence option was selected.
If that is not the problem then make sure that AE and AI are both up do date. If that does not fix the problem then we need to know version, os, and file details down to the last decimal point. I have not heard any other reports of this kind of bug.