Lost patterns and kits - WHY

I have this issue that has happened to me a few times now and is driving me nuts.

I’ll work in a project and I’ll be saving my kits frequently. I save the project and then not only are the kits not in the project, they have reverted to an older version where the kit has a different name and some of the patterns do the same or are just all together gone.
I simply do not understand how this can be.

I do back up to sysex sometimes but in this case its not going to help me.