2v1 Hedlok in Online Party Mode?

Not sure if anyone has experienced anything similar, but myself and another person in the online lobby got a 2v1 match against a Lv6 Hedlok. ^^^^^(somehow ^^^^we ^^^^won)

All the other Hedlok matches I've seen are 3v1. Is this normal but uncommon? A glitch/bug? Or does a special condition have to be met?