I just checked all outgoing transactions from SimpleTokenSale which happened almost at the same time as yours. And it seems like there's another guy who is in the same situation as you:

https://etherscan.io/address/0xcfeb18b2e4fc4fee7d5096a9a697abe1cbb654b4#tokentxns

The tokens were transferred out from this address to another, empty address. Also 25 days after they were purchased. Same situation.