So I own one of the larger bundles sold last year and I noticed that if I go to the game page; it doesn't say I own it though I have claimed the page as this account and email. The bundle in question is the "bundle-for-racial-justice-and-equality". Is this an error or is there a method despite digging through 50 pages to find the specific game I want since they seem to shuffle every so often?

The bundle's page in your library has a search field so, unfortunately, that's the only way to do it slightly more quickly than paging through. I have both bundles and now if I see anything that I might want to buy I have to go to both bundle pages to search for the game to see if I already own it. There is no other method.