Got feedback from the team that we will be cleaning this up in the next couple of weeks, this was added this way in case anyone had already added support for the initial method and weren’t able to make change in the meantime.
If you guys need a concrete date for the removal of the duplicate fields please let me know and I can see if the team can prioritize in a way to give a hard date.
The other question about msg-param-cumulative-months = 0 vs msg-param-months = 1. We are aware that there is a potential race condition in the system that causes this issue. The intention would be for both to be 1. We are attending to address this in a fix the timeline is TBD. I will update when I know more.