I recently upgraded to OS X Yosemite and the new Photos seem to be causing problems with uploading photos to ebay?

I Recently upgraded to OS X Yosemite and the new photos program hasn't been compatible when uploading photos to Ebay. When I upload photos to ebay the photos rotate on there own and some don't appear. I'm thinking I should of never upgraded and stayed on OS Mavericks. Can I downgrade back to OS Mavericks? Also since upgrading Icloud has tons of glitches and most photos don't appear.