Today I accepted the daily mission of hiring two sicarios but it was said to be complete after only hiring one. I'm pretty sure i had the same thing happen with a spin the wheel 2 times mission the other day. But without today's "double" progress on a mission I could've easily assumed I F-ed up.

It has just occured to me that I did have two unassagined sicarios at the time of today's hire. Perhaps they also got counted towards the mission total and buying the one triggered  completion.

And having had that thought, I had also spun the wheel twice before accepting spin the wheel mission the other day.