Yep... this happened to me also. On "Darkness of Tartarus," The world chat mislead me into thinking the stakes were 1000 gems, when in reality it was only 500. Now, this is interesting because on "Power of Shiva," I would be able to claim 100 gems completely. I'm posting this because in my way to the "1000" gems, I missed a 400 kill streak and more rewards than 500 gems can buy.