ESB-LS2

I have a C6 2005 Coupe for 2 1/2 years now with performance exhaust and Diablo Sport I-Tune on 91 octane tune. lately I can only remove the traction control with the button but not the rest. I push the button twice and the traction control goes off and then back on. it use to work fine but once in awhile the "check the traction control" comes on the display. if I'm driving at 30 mph or more and I floor the pedal for awhile, the traction control goes off and competitive mode engages. it won't go off if I push the button,only when I shut the engine off. has anyone had this problem,if so what was the cure and how much can I expect to pay? thanks in advance for your help!