Strange balance


Before 4 months, I mined some 50 ergo coins and left them be there. Today,
I decided to transfer those coins to a exchange site, but realized that the version I had (ergo 4.0.13) didn’t worked anymore. After downloading version 4.016.2 and transferring the wallets, I run the web service and saw something strange:

The wallet balance is 25 ergo but when I click at the address below, it writes the final balance which is 50 ergo. I have no idea what is happening, any help, please?