Thanks Chris... I think I understand what you are saying now.... hillbilly to hillbilly.
I have this problem at 30hz against my back wall and it's really bad. I suppose the modes are combining there. I can come out about 4-5' from the wall and it's no longer a problem.... it will level off properly. But it's a terrible boost when sitting down and your ears are within 2' of the wall. I guess I need about another 4 feet in my room length.
I looked into bass trapping this but I think it would be nearly impossible unless I could somehow build something strategic and huge... and then it would a lot of trial and error. I haven't seen too many bass traps that work below about 80hz.