Hi, I have exactly the same experience as you! Always have serviced at Ford, Past 2 times, I checked when was a little overdo for service based on mileage and was almost a quart low (about 4/5 of the way down from top fill to bottom fill dots on the dip stick). I assumed that I might be losing some oil some how. So I am due for a service soon and decided to check to see if I was once again about a quart low. I am now actuially overfilled so the dealership doesn't know how much to put in and it seems may not be adding/checking/adding/checking to get it right by trial and error. I'm pretty pissed off. Am I doing damage by being over filled? When they fill low as I described, is that bad as well? Since I now know I can't count on getting a reliable fill from the dealer, I will check after a service. I will also ask if they know what they are doing.
Ever since I have had this car, the dealers seem to know nothing because it comes from Europe. Every time there is a part specific question, they seem to know either nothing or very little. They certainly can't answer questions authoritatively.
PS, when I was low, I spent about 15 minutes trying to get the specific oil weight recommended. Nothing. Door jam, nothing. Went and bought on assumption. Went to add, weight listed on the filler cap! Dumb me, but can't believe the manual has nothing. BTW, guessed wrong... Over an hour wasted on really simple stuff.