It is alleged that during the crisis around 50% of the priests in the US were homosexual. 
Examining the records of 102 priests in Burlington Richard Sipe estimated that 49 of them were homosexual. He also found that 23 had been involved with abusing children under 13, 15 had been involved with married women and 19 with adult men. Like the John Jay Report, Sipe did not specify the orientation of the child abusers. In fact the only unpublished detail of the abusers seems to be their orientation. One has to wonder whether this is deliberate or not.
In England it was often said that Anglicans who were homosexuals chose the High Church so no one would question their embrace of celibacy. So you could well be right about Catholic homosexuals entering the seminary for the same reason.