s0e00? No such variable, has nothing to do with t. There is s00e00 though. Use the standard.
Single-digit season numbers are possible, but not recommended, and you'll need to come up with the code for that yourself.
Don't prototype your formats on the command-line where you won't see any warnings or errors. Use the GUI Format Editor. This issue would have been obvious as soon as you typed it.
Unfortunately I am running on ubuntu server, so no gui to use. But I'll download it locally on my machine and play with the gui editor. Thanks for the help!