Something's not right here, there's way too much wrong with this scenario to make sense...
First, anytime there's a discrepancy on the range it should be called cold until the problem is fixed. Heck, I've seen ranges go cold because someone's target has blown over.
Secondly, shooting at non-targets has never been allowed at any range I've been to. Way too dangerous.
Not saying any of this didn't happen, it's just not right...
This ^^^^