Recently I noticed in the Mint app on my phone, it would show some of my accounts multiple times, completely throwing off my income/expense and budget views. However, on the Mint web site, everything was normal and each account had only one entry.
So the problem had to be local to my phone, with some data it had cached before.
To fix it:
1) Go to Settings -> Applications -> Manage Applications -> Mint.com -> Clear data
2) Start the Mint app again.
I think something about it got messed up after I updated my phone to Android Froyo. I'm glad it's back to normal now because it's a nice app.
