This is a short one, but I just have to mention this:
This week, we actually had a minyan when we got to the Kaddish Yatom that we usually flip backwards for before the Torah service. So we did it then. Fine.
Then we got to the Torah service… and did it again. Of course, we also had the one at the end of the service.
For a grand total of three Kaddish Yatoms.