Strange audio Glitch

Ive had the LG Stylo for a little while now and it works pretty good but ive been having some problems with it, the power button will at times become unresponsive. Another problem im having is that whenever i plug in my headphones(Auvio) the volume will automatically lower itself everytime a new music track plays or i switch to a different youtube video, but it doesnt do it when i use my regular old earbuds, im gonna see if i can get it checked out by the people at radioshack but for now i was hoping someone would know how to fix this or at least know whats going on...