Walk Behind Lawn Mowers

I bought a husqvarna 775 hu775h last year right before winter. I was able to use it this year and I hate it. No matter what I do it leaves a trail of grass on the right hand side, I have tried the tallest and lowest settings, I have tried emptying the bag every time I do a row, I have tried walking vary very slow and still more grass ends up on the outside of the bag then does inside of the bag. Does anyone have any information on this, how to fix it or make it any better I really do not want to have to go buy a NEW new lawnmower.