Have you ever found a hive with 2 queens in it at once?

I identified this colony about 5 weeks for queen replacement later in the season due to the age of the queen, she was still laying strong and let her live to harvest resources and brood for nucs, when I came back to harvest more brood today, I found mother and daughter on the same frame. It appears the hive went ahead and superseded the old queen, and either the were OK with ruling the hive together for a short time, or the young queen just had not yet found the old queen.

what are your thoughts or expert and amateur opinions?