cabinet: motor parameters used:

encl type reflex
encl vol .2222222 lo cut 30
ideal fr 675 hi cut 1600
ideal q .5314961 eff 101
encl fr 127.9479 power 300
encl q .888889 impedence 8
encl ht 10.90272 quantity 1
encl wd 7.268482 vas 10.4
encl dp 4.845655 qd 45
frd 40

1. All dimensions use Imperial units, i.e. inches, feet, etc.
2. Not all are the same unit in the PiAlign program. Ve is in cubic feet but port dimensions are in inches and sq. inches. Cabinet dimensions are also in inches. The formulas on the Pi Alignment Theory whitepaper all "expect" units to be normalized to the same units, but the program uses those that are most common for the given term.
3. Vad=Vas, Frd=Fts and Qd=1/Qts. Note that Qd is not the same as Qts.

I am certain that one of these is the reason why your results were incorrect.