Locks usually only happen when you change IPs, so that's very odd...
Stealth aint detected, I have been botting oaks for 8 weeks straight in a hotspot and the acc is at 28.5mill woodcutting exp.
Mirror mode has been detected for the past 5-6 weeks now, what could have happend is that the change of client from mirror to stealth locked the acc because they did see you were using a client that has been tempered with. Ther eis a reason why almost everyone stopped using mirror a few weeks ago