Travis dude, the lazyman tek is crap, you should have browsed around the nexus before you started the extraction.
Back to the extraction, do you not have access to any HDPE gallon/litre milk jugs? those work much better than pots, the problem you gonna have with pots is trying to separate the naptha off from the bark solution. I imagine that you will have alot of surface area for the naptha to cover, making it a very thin layer of naptha, wereas with HDPE jug there is a smaller surface area near to the neck(this is where the naptha would sit. Also somthing else to consider is what material are these pots made of that you are using?
Another thing you say is that the one of the pots is like a brownie mixure? it should be black, like soy sauce black, not brown. If its still brown you need to add more base.
Dont throw anything away till you have your final yield.
Good luck!