1-2) Are you using the Timeout Decorator node, or the Timeout condition task? I would highly suggest using the Timeout Decorator node in Behaviour Trees as it work differently than the Timout condition task.
3) That is a really weird thing to happen hmm.
Can you please send a few screenshots or even better a small reproduction project showing the issues you have to support_AT_paradoxnotion.com ? (file attachements are temporarily disabled in this forum indeed).