There was probably some misunderstanding, If your maintenance ended in November 2018, you were entitled to major updates until that date and to minor updates after that cutoff date until the next major update is released (2019.1).
If you get a new maintenance now, you will get access to all updates until May 3rd 2020 for example.
Your perpetual/maintenance license is separate from any subscription, if you stop your sub later on, you will still be able to use your perpetual.