Apparently, he finished his course work and other required material in good standing, even calling his name at the graduation ceremony and then sometime between finishing and receiving the actual paper diploma he made the calendar.
Then BYU decided to refuse him the award.
It makes one wonder how long they watch you. What if it is ten years, five years, instead of one month.
Does a graduate have to walk on egg shells their entire life, looking over their shoulders wondering if this activity or that activity will mean BYU will snatch thier degree.
That is the precedent they may well be setting, and that would very possibly effect the long term value of their degrees.