well i am sort of glad i am not the only idiot who has done this. i am glad to learn why the water was pouring off the roof. my toilet did overflow and that water somehow ended up in the storage compartment, 25FB. dried it all out and have the bed opened up to promote additional air flow. i think everything is dried out at this point.
the explaination for why you leave the drain valve open when you flush is appreciated, i didn't know how all of that worked. from now on, i will take that advice and proceed with lots more caution.