Hello there! I saw your queries in the Squad Submissions threads, so I'll clarify:
The sigless squad submission thread is just that - you simply do just post there to add/drop pokemon whenever. It's there just so you can use that squad without having to wait.
The squad submissions thread is where you add the sigs, but you don't have to wait for them; if you want to battle just use them without the sig. If they are rejected you simply repost them with edits made to make them more balanced. The approving LO (Mercutio or Jerichi) will give you a reason why it was rejected so you can act upon it, but I think you can still approach whomever rejected it for more clarification via PM/VM.
Bios don't have to be added in the squad submissions thread, you can just add them to your mons when you see fit, but as the bios are used to justify your pokemons signature move many people just add them together in there.
I think those answer your questions, but if you don't feel free to ask myself, or if you want a more official answer, one of the LOs.