Went back through all the pic's,
I'm pretty confident i was mistaken when I flip flopped earlier, I'm confident your correct in your genders, Bigger ones the male ,smaller is female.
The size difference when they are together through me off so used to seeing big females with littler males and also you have a heavy set male and a lean female, Likely just a result of the male being bigger in the first place and getting a bit more food as a result. But this makes some shots of the males head /body ratio look female and visa versa.
lol tricky buggers to sex in photo's, sorta frustrating lol I swear in person i can spot the genders on them in a second , but in pic's not so easy.