Apparently everyone at PBO was going flat out yesterday to clear the backlog. Something like 11 flights in and out.
That apron has always been a tight squeeze but usually if a third 717 / 100 arrived when the bays were full, it would wait on the runway until the bay cleared. There might have been a reason for vacating the runway early but that is something for the companies and investigators to sort out. There is a third bay but limited from memory to F50 aircraft and below mainly due to pavement limitations.
RTIO will have themselves in a lather at the moment with the self appointed aviation experts (they call them "champions"
) providing expert opinion to senior management.
Aerial Perspective
I wish they'd stop calling it the tarmac... tarmac is a type of surface material. If it's not a runway or a taxiway it's an apron.
Even the cabin crew call it tarmac when doing the arrival announcement.