task killers cause way more harm than good. the android OS isnt like your windows based computer you have at home. it will manage its own memory and when memory starts getting low it will kill low priority apps. all the "running" apps that show up under advanced task killer arent really running. android suspends background tasks. they do not use battery, but simply continue to be stored in memory.
so i find it hard to believe that this actually increases your battery life. considering all those apps your killing arent actually using battery, in fact killing them takes more energy because you have to clear part of the RAM, as opposed to just letting it be which requires no energy. not to mention android is just going to restart half of them right away anyways.
so all your doing is preventing android from running correctly by constantly ending all its processes. android is meant to suspend processes, shut them down if necessary, and restart them in the state the user left them. ATK and other task killers will make your phone run worse, it will drain battery, it will mess with the cache, and any glitches you experience while using is most likely do to the fact that android isnt able to cleanly and smoothly kill apps and retain their data, ATK just brutally force closes them.