In the past few weeks I've been noticing allot of the same songs redone. Is there a difference or is it someone didn't do a search before hand?

I would say about 90% of the time a new version is made because the old one is very inaccurate. Small flaws should just be pointed out to the original creator in the song thread, however sometimes it is just better to make a whole new version. Another reason is because some authors have their own way to play a song and want to share it. I believe it's pretty rare that a song would be made without searching first. Normally the author will note in the details why they made a new version of a song already authored.

Is it possible that you just have the database sorted to the "updated" column? every time you load up you would see old releases at the top that have just been updated and are not necessarily new. If this is the case set the ignition database site to sort the "added" column be descending date instead.