If he left some of the settings unlocked, i would pull a little shift pressure out. if he locked the settings, I would just call/email him and explain everything and see what he suggest.
hitting second hard shouldn't cause it to shift again especially in SST mode, it should hold what gear you tell it to. maybe you have a failing shift switch???
by breaks the tire free, do you mean that it just chirps them for a sec, or will it just light one up until you get out of it?