It is the expected result. You are misunderstanding what the ZK plugins is for.
The ZK plugins is for generating vault-wise unique time-based prefix, if there is already 220213-, than we must increment to 220214-, because 220213- already exists.
It does not exist, as I edit the 220213- to 220213-A title so it’s unique, next time I create a z-note it says 220214 without checking the directory that 22013- is still a valid file name. And then the time stamp is one day forward, two days forward, three days forward, four days forward and I need to go in an edit something that YYMMDD- should say is today’s date.