The Second issue is related to that that the CSV is missing 2 rows. Please edit the CSV and add two empty rows at the end. If you open it in a text editor you should write two " , " on the end.
The third issue we can’t reproduce. I just tested imports with other users, and owners assigned to the assets can see their assets.
Try to clean browser cache and let the end users (owners of the assets) log out and log in and then check assets again.
If it does not work please send us a email to support.