Tillers

I have DRT900 that I purchased at the end of March. I am having issues with the shifting on the tiller. The gears no longer align with the shift indicator. Also I cannot get the tiller in reverse anymore. As you are shifting the forward and reverse till lock in way to the left. The middle portion is just very loose and the far right will get me into forward and neutral. Any idea what the issue maybe. I didn't want to tear into the transmission if it is under warranty.