It messed up my admin

I don’t know, if this is just me – but i’m not using any other admin visualization plugin and after activate this one, it looks wrong. In submenu, there are white background so you can’t see submenu buttons until hover. And there is some glitches displayng in main content area when you roll over with curson in side menu. I like the function to make menu custom width, but for this i don’t need plugin. Sorry, maybe something wrong on my side, but – i don’t think so.