I found the stories I was thinking of: The summary for Shayne's Group Therapy is "Trapped together, several versions of Clark Kent and Superman compare notes, and learn something valuable in the process."
I apologize for misremembering the author of Lunkheads. It was not Queenie; it was bakasi. The summary for this story is, "H.G. Wells is on yet another journey through several universes, trying to save the world. Tired and sick of what she has seen so far, Lois has just one question: Why help all those lunkheads?"
