Originally Posted by
r2d2
BA flights have distance-based earnings, so looks like the first flight was in a fare bucket with 25% earnings and the second one in a fare bucket with 150% earnings (maybe thanks to the upgrade).
BA have pound based Avios earnings. 6-9 / £.
Tier points are distance based.
upd to add: when crediting to BAEC. Who isn’t, yet?