I haven't noticed any problems with the auto brakes at all.  Make sure when you touch down that you aren't manually braking because as soon as you press the trigger for the manual breaks, the auto brakes will automatically disarm.  As for the RTO setting, what you typed is what is supposed to happen.  RTO is the Rejected Take-off setting and if you are above a certain power setting (as per take-off thrust setting) and you pull your throttles to idle, the Auto-brakes are going to activate.  That is how they are designed. As for the regular settings, if your not triggering the manual brakes on landing as you touch down, and your auto brakes are just dis-arming, you may want to issue a ticket or try re-installing the product as it will run a repair if the installer missed something during the initial installation process.