310 errors are fixed by changing the slugs?

I’m in a huge bind here. After relaunching our site, many of the pages started resulting in 310 errors. About 70% of the pages redirect to http://www.kgstiles.com/missing/ the missing page renders an error. I have tried about ten different ways to stop this from happening and I discovered that if I changed the slug, the page appears and it’s fine. There doesn’t seem to be any pattern to the pages that don’t work.

I mean wtf is going on? The url is http://www.kgstiles.com. Is there anything you can tell me?

It didn’t start until after we switched domain names.

I have even restored the files and the database from before this started happening, but that isn’t even taking any affect. Please help!