ocram

yes that solved it. Thank you:D

They are probably the ones related to record speeds/altitude/distance, those don't count towards the limit

try cancelling your current offers to see if new types appear

I've finished the main mission to the Mun and accepted the main mission for Duna, now instead of receiving any missions for Minmus I get various types of missions for the moon Pol. I haven't even left the SOI of Kerbin No matter how many times I cancel the contract offers, another pops up, always for Pol.

Thank you for all your efforts

Yeah, that was me, I can confirm that removing realchutes solved the bug in my case