Kerbal Space Program

Here's what happened.

I accepted a contract to achieve an orbit around the Mün.
I sent a vessel for that mission (named "Mini munar probe Mk1")

After a while I decided to send a manned mission to the surface of the Mün, then build another shipped and sent it to the Mün (named "Munar Lander Mk1")

After performing the orbital injection, I got back to the space center and cleaned the mess on the launchpad.
Then on the tracking station, I selected my probed which was en route to the Mün and noticed a contract was done.
The orbiting contract for which I sent that very ship was marked as done even though the probe was still not into Mün SOI.

You will find attached to this report the persistent savegame that has been saved after the contract has been deemed finished.
I also included a previous save I made before launching the lander.

KSP.log and player.log also included.

I use some mods but I'm pretty confident they shouldn't affect the problem and I'm pretty sure none is required as all the ships are using stock parts.

Let me know if you need more info or trials from me.