OK, here are the two dives I did in Cozumel on June 23. Track them on your NAUI tables and tell me how they work out for you.In reality, if you have tables on you, and dive with a depth gauge and watch, you use the deepest dive depth and the time accrued, which give a nice safety factor. This can be done for multiple dives too, just follow the NAUI Tables (see the above post) around again, with the residual dive times shown and factored into the next dive.
First dive: Maximum depth = 126 feet. Total dive time = 83 minutes.
Surface Interval: 1:16
Second Dive: Maximum depthy = 88 feet. Total dive time = 92 minutes
I am sure you know better, but when I see a people say they use the NAUI tables, what I frequently find is that they follow the NAUI first dive limits, do the same surface interval as everyone else, and then follow the NAUI first dive limits again.
Of course, I don't know how you can compute the second dive since you can't do the first one on the NAUI tables. Unless I am misreading it, the NAUI maximum time for a first dive with a max depth of 126 feet is 8 minutes, not 83.
EDIT: I forgot to mention that I was using 32% nitrox for both dives.