I think they dated the date 1 week after, could be the dispatch
send out early. Anyway, not an issue, right? I receive government
letters, some are practicing this way.
If you are saying at that date/time, you are sure the vehicle was
not at that location...etc, either yr vehicle number plate was
using by some one (another vehicle) or they noted the number plate
wrongly. But seems the speeding evidence should be captured by
camera....If you want to find out, write in and check...?