I too purchased my Olies from Black Jungle. Mine also are slightly different in appearance. Mine are breeding prolifically, and all of the offspring are pretty uniform in appearance. They look more like the lower frog in your pic. A lot of yellow / Kind of pastel yellow on the front legs and a big black spot on the back.
I got mine from Black Jungle too, mine are about 8-9 months old. I love the way they look. They mostly look like yours on the top of the photo, if you click my website you can see more photos of them, from froglets to juveniles and how their patterns change a bit. I got 8 of them, but not sure how many different ones I have photographed on my site. Mostly look similar. CAPhoto's Photos- powered by SmugMug