[solved] invisible vertices

Can anyone help understand why I have vertices that cannot be selected. I’m modeling with extruding vertices from a plane and filling them. There are no doubled vertices. On a few of them, when I grab them this happens and I don’t know how to fix the problem.:spin:

Well I’ve already figured out my problem, and do not feel incredibly smart for it. Somehow I managed to duplicate the entire model. The vertices I cannot select cannot be selected because they are not on the same mesh. Been one of those days ugh.