I hardly doubt it was an oversight; To me, I think it was a matter of keeping up with the supply order thru Corporate to deliver these and getting them thru must have been a challenge then. To me, they were assembled alike the VN Z28s Ive seen and I know of some very similar markings VN did that crossed over into the Z11 order alike the Z28 orders....The VIN thing on BB Z11 VN cars is odd but doc'd as such....Of the 10 I saw about 8 were like this on the lower side oil filter area!