Hey guys it was my job there that we have pictures of. I wasn't using firestorm... that right there in the picture is a gallon of power gel... it was ineffective along with a dozen or so other spotters. Long story short, I've determined the yellow dye is set and I'm awaiting a special order of dye products to try to remove it.
Prespray used was only a 9.5 or 10 ph standard residential prespray... carpet is nylon. Nothing wrong with the process at all, cleaned this home just like every other job we do and no problems at other jobs. I think something was in the carpet and when it got wet it immediately caused these stains. Solution hose might have pressed on the carpet and activated whatever was in the carpet to cause the stain in that pattern. Crazy situation but I'll let you know what happens mid next week with the dye restoration.
Do you know how to dye carpet?