1- Why is it that stakes from the Arena are being replaced? I select either large coins or gems to defend and when I come back to the Arena minutes before the time expires to make sure I still have the stakes and notice that they have been replaced by experience, smaller coins, credits or a chest? This happens a lot and its getting real frustrating. No battles have occurred so why is this happening?

2- I see stakes in the arena or see the banner announcing 1K gems up for grabs. When I move up the ranks to try to win the stakes I noticed that the player's rank has been skipped over. Or if its someone near me 2 to 4 players in front of me and I try to fight my way up the rankings the player with the gems has now been skipped over.

Can someone explains these vanishings?