This is probably something simple but it's quite frustrating.
I have KDE set up to have two desktops set under "System Settings->Virtual Desktops". I can type ctrl-left and ctrl-right to switch between them no problem.
If I type "window-tab", however, I appear to switch to another desktop... and I can even do it twice and get to a 3rd desktop. But, I can never get back to my main one. In fact the only way I've ever been able to get back to my primary one is finding an app in the system tray that's on my main desktop, and telling it to focus.
Any idea what might be going on here? I have a feeling I've got two different virtual-desktop schemes running at once, I just don't know what the "windows tab" command is invoking.