Multiple Wardens

I don't know if this is a bug or if someone just didn't tell me, but when I was messing around in an Ancient city, I set off a sculk shrieker (<--if spelled wrong just know I can't spell). Then I ran a way and set off another sculk shrieker. Then there were two Wardens following me. Like I said I don't know if this is a bug or if someone didn't tell me, but in my opinion a Warden in a ancient city should alert other shriekers not to go off until the Warden is dead