Elgg user confusion!

Hi all. I just migrated my Elgg installation from GoDaddy to Hostgator. Everything worked fine when they originally moved the site, but since it took two days (!!), I had to update my database again afterwards. Right after I did, the 'Like' plugin I had installed would log a user in as the user they 'liked,' (yikes!!) but then I ran upgrade.php and now it just logs the 'liking' user out instead. Also, when a user posts on another's message board, the comment gets attributed to the profile owner, not the commenter. There were also some group albums and user files that disappeared, but I found it easier to have the users re-upload them than to try to fish them out with MySQL.

My little world's gone crazy. WHAT'S GOING ON HERE?! HELP! lol