help me fix it.

I’m working on my first module. I’m not sure if the problem I am having is something I screwed up or a bug. I understand that the “Use combined application window” setting under Preferences → General controls whether the first Pieces Pallete is part of the main vassal window or not. The problem is I have this checked and only have one Pieces Pallete and it’s always a separate window. This changed at some point during the creation of the module but I don’t remember what caused it. I did duplicate a pallete at one point with the intention of having two but eventually went back to one. Is it possible that Vassal thinks I have the second one despite there only being one or is there something else that could be causing this.