i'm not sure if people are getting what mudshark is on about (or i've missed the mark completely…
from what i gather,
if you imagine the car only has 2 wheels on it (the others haven't been fitted…), with the same tyres fitted.
if the car has both wheels on the LHS, the tyres are both pointing the same direction (eg chevrons pointing forward at the top of the tyre)
however, if mudshark moved (for eg) the LHS rear to the RHS front (leaving both rear axles without a wheel) then the LHS front will point forward, while the RHS will point backward.
the way i see it is that mudshark has 2 current options.
tyres pointing the same direction on the LHS (of one type) and tyres on the RHS also pointing forward (but a different type to the LHS)
or
front tyres being the same, but pointing different directions and rear tyres the same, pointing different directions
moving a tyre to the other side of the car will reverse the direction it points.
does any of this make sense?
as for what he should do, i've no idea.