Just another newbie question
completely normal. Locks are a progression. They will loosen up a lot if not come out completely before they start to come together again. back combing and TnR are really just good for blue prints of where the sections will form. Back combing is not terrible. It does do some damage, but it's by far not the worst thing you could have done.
Good idea using beads and then replacing them over the loose hairs. Beads help section your hair and sometimes, even, help knot them up faster.
Keep up with what you're doing, but don't reback comb them. If they fall apart, let them, they'll tangle again. Back combing helps kink you hair and it'll be easier for it to tangle. Just let them be now. Keep using beads if you like them, and don't ever use bands.