Did different clans have different writing? that might explain the multiples.
Over time as writings were re-discovered by other clans, they could have crossed clans, creating more accepted writings.
Especially since Hmong wasn't really officially written until what? around 1950? maybe a little before.
I'm not going to even try to work with the earlier stuff, until I can read/write and speak reasonably fluent.
The history of the Hmong is not sad because of how they lived, it's sad because of how every place they moved to, they were persecuted and driven out. So often no one knows where they originally came from. If you stay united as a community, the knowledge and history of thousands will put together everything. Unite and share knowledge, and I am confident it will come together.