Help! I participated in Binance's new token sale tonight, sold the tokens for 180u, and the transaction was successful. I took a screenshot. After a minute, I checked the transaction record, but it changed to 174u. Why did Binance alter the data for a successfully completed transaction? This is not a slippage issue; if it were a slippage issue, there shouldn't be a screenshot showing a successful transaction at 180u. Can Binance modify user assets?