& (Or Maybe Something Else) Is Screwing Up My Homebrew Items

I have several dozen hombrew items, spells, and feats. I have been categorizing them by using little parenthetical tags i.e. (Magipunk & Monsters). I have a magic item with hombrew spells added to the description and only some of them are working as intended. I have a very basic understanding of source code and I can't figure out why it isn't working.

I would really appreciate some help figuring this out. I'm hoping to get some help by posting the problem here. I'll add some images that could hopefully help figure out the issue.

I know that I can't do that, but usually when I use it myself it works for some of them. For example, the commlink is also a homebrew item, but that one is visible with the [Tooltip Not Found] tooltip while the others aren't.

Can you explain what you mean by create and style the links to the homebrew. Like do I use insert/edit link to a webpage? Can I use the "view" page of the spell?