Ah Stephen you reset my brain! When Joe said it sounded like a motley I want automatically onto motley mode but that's right, it could in fact be an outcrossed blood that scored a very plain belly from it's blood parent.
I VERY much doubt you've bought an amel bloodred (plus the head doesn't yell straight blood) but the head is somewhat blank, so there could be a chance that this snake has some bloodred heritage somewhere. No guarantees though and only a confirmation from the breeder or breeding trials of your own will confirm this.