The "00" or "01" could indicate the manufacture year, not necessarily the sale year. I'm not sure if this is still done, but it could be that autos/trucks produced at the end of "00" could have been sold in the US as "01"s once exported to the US. This may have happened towards the end of the year, when the VX was in transit or some such.

This was once common practice - leftover 67 Austin Healey 3000s were sold in the US in 68 as 1968 models (the only thing different with them was the add-on AC unit in all 68s - they actually have 67 codes for manufactor in the VIN - however they are referred to as "BN8s"). It used to be common for 1/2 years to be produced as well - especially to meet safety regulations - that's why there are so many 1974 1/2 models, especially of British autos in the US. The 1/2 models have these huge bumper blocks to comply to US safety standards imposed that year.

-- John