The bad news is that you are considered a visiting reserve. One of the dumber items in the contract. 20-H-7. As a visiting reserve you are Step 1 when assigning open parings (20-I-4).

The good news is that it looks as if the trip was assigned without being open for four hours and not in the assignment window (11am the day prior). I'm guessing there might be another provision covering your scenario or scheduling is making it up on the fly.

Please file a PDR for an accurate response.