Originally Posted by
Blumie
What is unusual, in my experience, is for a flight to be listed as A1, and for it to still be listed as A1 after an A seat has been allocated.
It's not the same seat as before that is being listed again. You took that seat. The system then allocated 1 more seat from J inventory to A.
Can happen frequently. Can also go the other way - for example, I have seen Z2 I2, I buy a single Z fare, and then it converts to Z0 I3, with that last seat that was in Z class, being bumped up to I class.
It's the algorithms making instant pricing/inventory decisions