@Alan_Schezar Did you ever fix the issues?
I own/owned a few watches with this movement, which is a modified A7750. A typical and common problem with this particular movement is the chrono hour counter (lower hand at 12) constantly running. To solve this problem, one has to disassemble the hands, dial and two top plates of the movement in order to gain access to the chrono's hour wheel. Once there, the parts involved in braking the hour wheel - especially the plastic brake - need to be fiddled about with. With a loupe, check that the plastic brake is touching the hour wheel; if not, replace this part and check for contact again. That's the only solution to the problem.
Now regarding the big chrono seconds hand, as other colleagues have said already, it is lose from its central post and needs to be reinstalled with proper pressure.
Lastly, it is impossible to have the chrono minutes counter (upper hand at 12) running unless the chrono function is running. That simple. I believe your description of the symptoms are wrong in this particular aspect.