disconfiguration of all that was created

I have created an animation, and at each step I have saved the sequence and the positions with the position manager.

When I close and reopen the skp file, everything appears misconfigured in positions that do not correspond to those I have defined.

It has taken me more than two hours and all the work is in the trash.

What should I do to keep everything as I define it?

What is the “position manager”?

Are you referring to the Animator extenion by Fredo6?