About skipping the stop - I have seen stains result a number of times over the years (mostly in community labs) from skipping a fix, at least when using an acid fix, which seems to be what you are using. The first time was when I was in the Army, the stains were a pinkish - brown, using Dektol straight into the regular Kodak powder fix. I was told by a lab technician years later that even using plain water as a stop will risk the same stains, with an acid fix.
You might be better off using an alkaline fix, like TF-4, with a second bath, and then pitching at least the first one when finished.
If you search the threads for TF-4, you'll find info on it.