Grouping up in a team of 4 guild mates, setting our roles to be compatible (1H/1T/2DD) and queuing for a random normal dungeon, we just had two bugs hit at once.
First, a member that was level 29 got the message "port failed" and was told she could not enter the "vet dungeon", even though what we asked for, and what we got, was normal mode.
Second, a member that was around CP600 got separated and sent to a completely different instance of the same normal dungeon. Some of the people in that group were on his friends list, but he entered the queue with us, accepted the random dungeon while being grouped with us, and should not have been sent to a completely different group. I have never seen this bug before.
We ended up with only two CP810 people in the dungeon: the tank and the healer. Not really wanting to run it like that, we decided to take the penalty for leaving and try later. That second attempt still had the level 29 member being left out. Only the third attempt worked, after yet another penalty period. This is ridiculous.