After some dry time it looks much better. I am sure I overwet the carpet as it took overnight to dry. Not sure whether I put too much prespray down or the pads were too wet. I did prespray 3 times though as I used a pad 1st, then fiberplussed it, then used a pad again to get the soil up. Do you run into this if the stain is too dark? I used Orban. Should I have just kept running the Challenger over and over the bad part more instead? I want to do the rest of the carpet today and there are a couple of more bad stains, not as bad as the one I got up but bad anyway.

Orban?
If you have the time and inclination to do so, you can continue to go over a carpet area of any type until you see no more soil appearing on your pad. But remember to keep the machine moving. Don't let it just keep running in one area without moving it back & forth or from side to side.