Game Center Leaderboard updating -- is this normal

Hi,

I have been using GGPS for ages without a problem but I have embarked on using Game centre in my IOS games now.

The transition I thought was very simple, intact it worked straight away.

Anyway, I haven’t updated the game , currently version 1. 

I have version 2 ready to go  but have a question.

When i play the game and call game centre the first time, the leaderboards showed up and the sore was duly submitted…fine.

Now when I get a higher score and call the leaderboards the score does not update with the higher score.

Any ideas guys?

thanks