Alright, I found my answer. Apparently, once you open the Hidden omod list, the highlighted omods are the ones that remain hidden. In order to 'unhide' them, one must simply 'deselect' one of the omods. I was going completely backwards, thinking that you needed to select them instead. To those that looked at my post, I appreciate your doing so! :D Still, anyone able to explain the purpose of hiding omods? Thanks