You were probably staking on a wrong fork. Had that happen and I had staked like 100k lol. Once I resync though those coins were gone and really only staked a few thousand.
Hopefully I made a back up a few days ago (I forgot I had done it) and I got my coins back. The balance now matches the one mentioned in the blockchain.
Thanks for help anyway mates
You can do the same by just running qt with the -rescan option. It will run through the chain and read through all the blocks that involve your addresses.