Most new machines will strip on the first pass, through the pits, then oil on the way back. Seeing as though you saw the machine only going 40 ft., they did not strip. they just oiled over what was left. So yes, there was a bunch of carrydown.
When you see the machine make 2 trips, the machine is double oiling. You can double oil with out stripping also, but if you see the machine going through the pits, it is stripping, and oiling on the way back on the first trip. The second pass is only oiling, usually in both directions, as the machine is moving forward and then as it moves back to the foul line. =:^D