Something I did recently has caused my TotalTerminal window to be stuck taking up the entire screen. I've tried deleting com.apple.Terminal.plist, com.binaryage.totalterminal.plist, and logging out/logging back in. If I select "Window -> Return to Default Size", my TotalTerminal window goes back to 24 lines per the settings, but if I Cmd+T to open a new tab, it expands back to filling the entire screen, both vertically and horizontally.
I'm running OS X 10.9.5.
I have a vague sense that Mavericks is getting in the way here, trying to remember my window position or something. Has anybody else run into this and gotten out of it somehow?