Agreed. Another theory would be that the manual has a misprint and we all actually have 6 quart engines but then everyone doing oil changes should notice the same as you. Probably few have reached the 10,000 mark so only a handful may have attempted oil changes so far to get rid of "break-in" oil.
In my case adding 5 quarts per the manual definitely brought mine to the top dipstick line but that isn't conclusive because I used an oil extractor to remove the old oil through the dipstick tube and maybe I can't use one of those because it leaves a whole quart of dirty oil in the engime.
I am very interested in how this thread plays out. If the manual is wrong about 5 quarts and your experience is the norm then I can't use my oil extractor in the future. Bummer, but I'll owe you a debt of gratitude if that's the case. I'm going to swing by the dealer on Tuesday with other questions so I'll ask about oil capacity and see what they say. I'll do an Internet search too.
Pacifica Limited, Vel Red/Black/Alloy
Tow, Vac, SafetyTec, UConnect Theater, 18" Wheels