Once again I repeat my self in this other thread. The ZK ID plugin goal is to generate a vault wise unique prefix. Not just the file name has to be unique but the time-based prefix has to be unique. That is the purpose of this plugin. That is why it was created. If a collision is detected, the prefix ID (date in this case) is incremented by 1 unit. If we hadn’t done this, you could end up with two files with the same prefix and this defeats the goal of this plugin.
If you just want to slap the date of creation before the title of a note, you are using the wrong tool for the job. Use templater plugin.