Booked on Flight 1607 Tomorrow Oct. 26 PHL - PIT, Depart 4:45 PM - Arrive 5:45 PM

Yesterdays Flight 1607:
Comments: This flight arrived in Pittsburgh, PA at 7:17pm. The flight is operating behind schedule due to maintenance affecting a prior flight. The flight is operating behind schedule because the aircraft for this flight was affected by an earlier delay.

Todays Flight 1607:
Comments: This flight has been cancelled. The aircraft is unavailable because of a prior cancellation due to aircraft maintenance. Customers will be re-accommodated.

Kind of a new plane for so many maintenance issues, no? Or is this just code for another reason like not enough paying customers?

Don't you remember when the first ERJs were introduced about 5 or 6 years ago and it seemed to me that there were maintenance issues with them almost every day?
I was mostly flying on CO at that time and they had started with them on some of my regular routes. Because of the unreliability of the first lot of JungleJets (or the time needed for proper shakedown), I spent a few extra nights in places like Louisville and Cincinnati.