Hi mooseman..... sounds like it's just the wheel and mag type of alarm rather than atts in particular.
From fishing along side people with vibration sensitive alarms, from what I can see they nearly always have to turn the sensitivity right down anyway to negate false indication all the time .
I personally haven't had any issues with my atts & had them 4/ 5 years now I use 4 mag wheels with mine .
We all get done without knowing about it no matter what alarms we use .
I wouldn't be swapping my atts for nash heard bad things about them .