That high of O2 is consitent with the amount of excess air (162%). It is probably under fired like davidr is saying as opposed to an inducer sucking way too much air.
As fat eddy says the guy should have clocked the meter.
It is not that big of a furnace, I would wonder if the anticiaptor setting is wrong or if a cold draft is influencing the thermostat.
The OP's response to fat eddy says the house is negative, maybe cold air is getting pulled down a wall cavity and influencing the stat.
Probably has about a six inch b-vent, too much surface area, causing the condensation problem. Vent tables may require a 4 or 5 inch depending on height, water heater etc.