Thank you both for your responses.  It turns out this IS the case for me.  This only happened when the DBCC checkDB was running.  Since then it has completed and...

So how I discovered the odd results were looking at the function DB_NAME(db_id) for ID 15 and 29 both resolve to the same database name.  I see database_id = 29 ...

Eric - This may not be related to your specific issue, but I was having a problem where MSrepl_commands wasn't dropping below a certain size and when the distribution cleanup...

How did you discover the indexes were missing in the first place?