the Back Button Problem

When selling extra items, once the little gold bag loaded saying amt received, I hit the back button on my phone to return to the weapons area quickly. When it went back it also sold the 1 item I kept and Did Not credit the gold for the sale to my account!! Next problem with back button use I noticed was when I purchased 50 of Energy for 10 R Credits. When I hit the back button to re-engage in the Battle it auto purchased another 50 of energy without the opt out warning. Has anyone else noticed these problems?

In this case, it sounds like the behavior you mentioned would be correct for the back button (aside for not crediting gold, which I could not reproduce). You should not use the back button after purchases generally unless you indeed want to purchase the same again.