If I understand your situation correctly, you should be able to synchronise your revals in 2 years time by doing the later one early, and then they will both expire on the same date. Remember also, that you can revalidate ratings up to 3 months early, as long as you have met the requirements, without loosing any validity. ie. The new Rating runs from the expiry date of the old one, so you may be able to revaidate both ratings at the same time, even if the expiry dates are up to 3 months apart.
MJ
