You probably have a lot of options checked in your config of autoimport. Nothing to be concerned about.
You certainly don't need to have rebuild thumbnails checked which is a waste of time everytime you import. Uncheck that option at least
I have only three options checked --
- - the Fix Broken links should be normally set to YES (protect missing drives) -- this will probably help with the extra stuff you are seeing the second time you run it -- the first time it will try to fix and/or analyze the library
- - Update for external changes;
- - and write file tags
I don't like to automate too much, personal choice