CLOSED: Script conflict issues

Thank you to everyone who responded, I have found assistance.

OC 1.5.5.1
chloelina.com

This is beyond annoying. Worked fine http://forum.opencart.com/download/file.php?id=24338 then I decided to upload customized AddTHis in place of the Default that comes with 1.5.5.1 and that is when I noticed that the Colorbox went all wonky for new images: http://forum.opencart.com/download/file.php?id=24337

Have searched and researched, posted to Gen.Support here in the forum See this post: Colorbox not working for only newly added products.Spent the last 1.5 weeks trying to fix the first issue. I have to cry UNCLE!
Issues listed in order of importance, please PM with quote and time frame to complete.

Issue: customized default theme and default theme with new product images not appearing as colorbox in Chrome and Firefox. Possible script conflict with addthis on product page? The two new product pages push footer to the right. (??)
Path: Face>i-Radiance Eye Cream and Face>LavendarPatch Beauty Bar.

Issue: website not centered in Chrome, looks fine in Firefox (of course).

Issue: Cannot switch templates in backend, dropdown box does not show "default" or custome theme name. Switched manually.

Thanks,
Kim