To me it looks as if you've installed some software which has created the
/catalog folder. Do you have a program which was installed there, ecommerce shopping cart maybe? Or a CMS? If so rather than messing with redirects on your index.
Move the entire folder up to the top level. Then redirect your product or regular pages from
/something. Use canonical attributes on your index to let Google and others know which is your primary home page. In Google and Bing Webmaster Tools areas, specify the correct domain for your index. Re-submit your sitemaps as well.
I would do this so that you can avoid having
/catalog appear at all if possible and have