You are mixing up different numbers. I checked Lances website:
Ratings:
GVWR = 3700
GAWR = Not Listed on their website but probably 3500lb as they won't make a custom axle for a travel trailer. You get the GVWR when you add the hitch weight.
Empty Weights as it comes from the dealer:
Unloaded Axle Weight = 2530
Unloaded Hitch Weight = 245
Unloaded Total Weight = 2775 (2530+245)
So you have 925lb of cargo capacity before hitting the GVWR
Of course this is all per the design calculations, so it might be off by a bit in real life.