Alfonso - it sounds like your motor vehicle inspectors really appreciate cars, and not blindly following rules. There could be another reason for them giving you short plates - we you go howling by a police car they won't have very long to read your plate, so a short plate works for them
Sounds like you have a terriffic car you are enjoying it !!!!!
Don't stop, unless it's for police cars and your friendly motor vehicle engineer
regards
Doug I