RCtime,
In the event of a discrepency, between the dipstick and shift selector reading, I'd suggest you go by the dipstick. You may not be at the correct temperature window for an accurate shift selector (oil level sensor)reading.
At the low mileage you're putting on the TranSynd, I'd say do an oil analysis at the beginning of each travel season and don't change it until the oil analysis says to. Your only concern should be contamination from water or glycol but it's a low probability on both. Change if water gets to over 0.2%.
I think you can get the dipstick "TranSynd Only" labels from Allison on their website.
