title: questions about Game Center (sandbox)
body: <p>I'm using pretty straightforward code, modeled on the code in Strougo &amp; Wenderlich, but wacky things are happening that I'm trying to figure out. A couple of them:</p>
  
  <p>1) In the Game Center app on the device one game I bought from the app store (namely Temple Run) is showing up in the sandbox along with the game I'm trying to debug. How did that get there? I have several other app store games with game center features that don't show up so it isn't that everything on my device is showing up.</p>
  
  <p>2) The game I'm developing has achievements and leaderboards. The code for submitting both seems to be working but only my achievements show up in the Game Center app. It says "No Leaderboards" instead of showing my leaderboards.  However if I run the code that retrieves leaderboard information it works as expected and I get back my scores.</p>
  
  <p>3) The game center app in the simulator doesn't say "No Leaderboards". It has leaderboards for my game but it says "No score". On the leaderboard detail screen it shows my rank as #1 of 1 friend and #2 of 2 players, and on the detail of that it shows the actual scores in my test game.</p>
  
  <p>4) The simulator's game center app says I have no achievements even though the device's game center app shows the achievements correctly. Is the simulator's Game Center app simulating the Game Center Server and not communicating with the real Game Center server?</p>
  
  <p>5) Do I count as one of my own "Friends" even though I didn't do anything to become a friend (to explain #3 above)?</p>
  
  <p>6) The leaderboard screen on the device looked like it was working at first glance but I just realized that the scores it's showing are numerically wrong! What's with that? Maybe they're left over from yesterday or some other time?</p>