You have an interesting situation and I think you are doing the right thing by approaching it cautiously but diligently. You wouldn't want it to be starved for oil or be overfilled, either. I don't have any direct experience with the DCT models, but based on your description, there seems to be some kind of problem with your machine, because if you are following the procedure as laid out in the owner's manual for checking the oil, you should get a reading that makes sense, and you are not getting that. One would think that a machine with only 1.9 hours and 18 miles would still have the correct amount of oil in it from the factory, but, anything can happen.
Did you buy this machine from a dealer? If so, I would ask for their assistance on this matter. If you bought it from a private party, you are more on your own. In that case, maybe a good first step would be to drain the oil, but measure how much oil comes out and compare that with the specification in the owner's/service manual. That should give you some comfort if the amount that is drained out is close to specification. If it is, then I would go ahead and drive it while continuing to look for an explanation of your dipstick reading anomaly.
Did you buy this machine from a dealer? If so, I would ask for their assistance on this matter. If you bought it from a private party, you are more on your own. In that case, maybe a good first step would be to drain the oil, but measure how much oil comes out and compare that with the specification in the owner's/service manual. That should give you some comfort if the amount that is drained out is close to specification. If it is, then I would go ahead and drive it while continuing to look for an explanation of your dipstick reading anomaly.