Every tenth lost on the 60ft is two tenths on the big end. Using that logic, if you got a 1.8 60ft on your second run you would be 12.7 ish. Anytime I would screw up the 60ft, I would do the same thing you did, faster mph, slower et.
$175/ hour seems very high for just some runs, no tuning. Imo, dynos never have the same load as the street. I recently rented a dyno for some testing, and found out the tune that made the most power on the dyno, didnt run so well on the street.