I've got a LHR-FRA-LHR trip next week in CE.

The seat maps for both flights show 3 rows of CE, followed by a row of WC, followed by a galley. One aircraft is a A320, the other a A319.

There are usually 5 rows of CE on these flights. I can only get a middle seat on one of the flights

Would this have anything to do with me dropping from Silver to Blue on Saturday?

Cheers,
Rick