What Gender Are My African Dwarf Frogs?

Hey, I know I've been posting a lot, so I apologize. I'm new to aquatics, which is the whole reason why I made a Fishlore account.

Anyways, I bought two African Dwarf Frogs last week. The worker at the store I bought them at didn't know the gender of the frogs, but I didn't really mind anyway.

I knew the males have the spot under their arms and is physically smaller than the females. One of my frogs has the spot under their arm, but is much larger than the second one. The second one is really skinny and doesn't have a spot. If the second one is female, should it be larger than the first one?

Also, the second one, has a weird humpback. Obviously, it's deformed, but seems healthy and is swimming and eating fine. I was thinking maybe it is female, but because of its deformity, it was probably difficult to compete for food back at the pet store, so maybe that's why it's skinny?
Anyway, can you guys help me out telling me their genders? Thanks!

 

HI ShadowNova
Possibly both males. The frog in the first picture looks to have a spot under the arm? The 2nd picture, the spot is pretty pronounced.

Can you post another picture of the frog in the first pic?

 

HI ShadowNova
Possibly both males. The frog in the first picture looks to have a spot under the arm? The 2nd picture, the spot is pretty pronounced.

Can you post another picture of the frog in the first pic?

Yeah I noticed the small spot on the first one too, but because the second one had a larger spot, I assumed the male spot should be that large. Thanks, maybe they are both males.

 

The spots can differ in size and coloration between frogs

 

The spots can differ in size and coloration between frogs

I feel like I read somewhere that females could have a small pink spot too? I could be wrong.

 

Also, when purchased, many aquatic subjects are immature and not always showing their full adult characters.

 

Also, when purchased, many aquatic subjects are immature and not always showing their full adult characters.

Is it possible to tell their age from photos?

This is the back view of the frog with the humpback. (my camera focuses on the tank's glass, instead of the frog so it's kinda blurry)