Rockbox

Hi, I have an iriver H320 with Rockbox on it and I regularly use it to record my guitar lessons (about 1hr 20mins long usually) which I listen back to later. There are 2 quite frustrating bugs I have encountered whilst doing this. First up is that if I stop it and then resume it (or indeed if I resume from a bookmark) it restarts in the right place in the recording but the screen tells me that it is starting from the beginning. Then when I fast forward it and continue playing it it goes back to the start.
The other thing is that with very long recordings if I rewind it to listen to something again it always jumps forwards by a few seconds when you stop rewinding making it very difficult to find the right bit.

Thanks,