Fuel Management Question

[RADIOCOMMANDER]

I have just purchased my first Cessna 337 B, and love the aircraft! I flew exactly three hours on an XC leg recently, and the the aircraft took the following fuel levels to top off when I landed and topped off:

Right Main 15.0 gallons
Right Aux 17.7 gallons

Left Main 24.2 gallons
Right Aux 10.0

My flight departed using the Main Tanks on front and back engines for a period of one hour, at which time I switched both to the Aux tanks until just prior to decent. My engines were leaned at 10 GPH each.

While the fuel burn appears to be spot on, the tank fuel use levels do not. Can anyone educate me on what this looks like to them, or is there something I have missed in my own analysis and study of the fuel system and P.O.H. ?

Many thanks !

Radiocommander