Box Tuning for SPL

First Question: I doubled my power and outlaw #'s went up 1 db but Portwars # went up 3 db and change. Is this a symptom of my port being to small?
2nd Question: I'm starting a new box and was going to start the tuning at where my old box was. The old box I adjusted the port to get the best #'s. When I Figured it up it the old box was tuned to 71 Hz and I'm playing at 63 Hz. How dose that work? With the subs and box I keep coming up with I should tune to 61Hz to play at 63Hz?

Anyone ever seen this before?
Thanks.

Well if your using that S-10 in your avaitar best people to ask about tuning would be Jimbo (Stingraysevenout),Jeff (Sanman),Robert( Mod4000) or Chris (bumpin s-10)

Thanks. I'll try to cach one of them.

how big is your box and whats the siaze of your port.s-10's do seem to play the higher notes.

6.07cf with a 13.5X9.75 port thats 3.5 long playing a 64 hz note.

Talking to Sanman I need to be playing a lot higer note. He also gave me some other good advice that will have to wait tell money's better.

Still wanting general advice on box.