there is a log of when process priorities are changed (see configuration tab), but i see you are asking for something a little different, to get a complete list of all processes running when cpu priority get too high.. i think i might be able to add that.
as for the bug you report i will check into that this week - you might have found a bug in the code that is supposed to only temporarily postpone changes.
i am supposed to release a new version of process tamer very soon, i think at the end of this week(!)
so hopefully i should be able to address this stuff.