Does Unity have a maximum number of UI elements?

As I was making my game, I ran into a small problem. All of a sudden a couple of UI elements didn’t show up anymore. However when I deleted some other UI elements, it showed back up. I’m currently using Unity 4.6.1 and is there anyway to make unity hold simply 2 more Panels and text boxes?

Must have been some kind of glitch. Everything is working fine now.