I think something wonky is going on..
Today I booted up the wallet and waited for it to synchronize.
After complet synchronize it told me it is on block 33520 so I checked with the explorer and it told me it was on block 33540 so a 20 block difference.
I have the same problem. I'm about 20 blocks off.
Yesterday everything was fine. I kept my PC running over night with mining on and today its not in sync with the block explorer.
What is happening now to the blocks I found?