I can't help with sexing the chicks - they're too young to tell (for me). But I did want to mention that there isn't a way to sex chicks by looking at their wings. There are millions of old wives tales, and maybe looking at the wings is one of them. However, it's just an old wives tale. If it actually worked, every hatchery would use that method rather than the expensive and labor intensive process of vent sexing at less than a day old.
Sorry you got snookered...
PS. Edited to add... I clicked through the rest of your pictures, and I agree with the PP. Angel, Cricket and the other one (forgot it's name) look like roos because of the very red comb and wattles. Turtle might be a pullet, though.
