To clarify:
1 Magus recognition
2 Magister recognitions
2 HP recognitions
All were fixed. This is not a debate nor argument thread.
Well, humans can commit errors, that happens, regardless how advanced they are. All humans can do is recognising the error and correct it as part of their xeper. However, according to the official TOS dogma, it is not that simple, with some priests having had a bad day concerning the recognition.
I dare quote from the official TOS FAQ:
The III°-VI° are properly seen not as further benchmarks of individual attainment, but as specialized religious offices conferred by Set alone, and Recognized within the Temple according to his Will.
So the argument "humans commit errors" does not wash in this case. Which leaves us with several possibilities to explain things.
1) Set wanted to make fun of the TOS.
2) Set was fooled, too. (what great black magicians..!)
3) The priests did not understand Set in such important (well, TOS-internally important only, of course) questions. Which makes the whole priest caste dubious.
4) Set has, in fact, nothing to do with the recognitions, and the reason that the priests claim the contrary is that they use it as a comfortable shield against all possible questions from the lower ranks. ("It is the god's will" has worked for millennia, hasn't it?)
5) some other explanation which makes neither Set nor the TOS look funny, but which escapes me at the moment.
My bet is #4.
Along that direction, I observed some funny discussions about III+ who quit the TOS and kept their title in their signature. Some TOS members objected that they were not anymore members of the TOS and thus did not have any rank any more. Their answer was that officially, it was not the TOS, but Set who had conferred the title, and since they still were Setians, so they would keep their rank. IMO, a classical backdraft of the "god has decided"-trick.