Broken Product Tags

I looked around and tried a few of the solutions I found here on the boards, but my problem still exists. I am using this extenstion that I slightly modified and (I believe) 1.5.5.1. Below is search results / items with tag:

• Black 0/28
• White 6/6
• Red 12/14
• Blue 3/1
• Animal Print 3/3
• Green 1/1
• Ivory 2/2
• Pink 6/6
• Purple 4/4
• Yellow 1/1

So for some reason, none of my black items are showing at all, most of my red are, and I have extra Blue. One forum mentioned replacing an entire script, which just threw a bunch of errors for me. Another mentioned replacing instances of filter_tag with tag, which again did not work for me (the extension uses filter_tag). What makes this really weird is that it all seemed to be working fine until I added tags to more products, and then it just didnt work. Has anyone had a similar problem, or know of a possible solution? I would appreciate any help.

Bumping in the hopes that someone knows why only one tag is not returning results.

None of the color are working on mine
1.5.6.4