trimming

So received this mini drone yesterday, it has 3 speed modes (30%, 60% and 100%), and everything worked fine earlier, but since I flew on the 30% mode for a few charges, if I switch to another speed level, trimming absolutely messes up. You can press the trim buttons as much as you want, nothing...

Hello, My Quadcopter doesnt control well, for example it drifts forward, but when I put the stick backwards and then let it go it doesnt drift forwards but in an other direction. Does anybody know how I could solve this problem? Hobbyking X580 GlassFiber Frame Turnigy NTM Propdrive 28-30S...