I don't know how to fix the skipped stitches but suggest, if you haven't already, take your BSR foot back to the dealer and ask them to put a new spring in it. My 820 BSR foot does the same thing - expect it's not a few skipped stitches and the dealer put a new spring in it. So far I haven't tried it again - I was so upset with it last time. I don't want to be upset about this machine again until after Christmas!