This seems puzzling.
I think there was a misunderstanding of what was going on. There may have been a language barrier?
It's hard to understand an experienced professional guide going onto the East Face without technical gear, or getting lost and missing the MR. Even if the first time on the mountain. (don't know)
??????
The Boy Scouts also seems odd. Thought he was behind, but he was in front, then took the wrong turn at the intersection...and kept going. May not have realized there WAS an intersection. Was found about a mile from their final destination. At least he was prepared.