Mysterious extra charge on transaction to shapeshift from blockchain.info?

[btc3769]

I recently sent some BTC to an altcoin via shapeshift.io from my blockchain.info wallet. Shapeshift gives you a single address to send it to, which I did, in the amount of roughly .152BTC, but of that, only .1486 arrived and .0038 went to another address I didn't see in the initial transaction. There was an additional .00027 BTC mining fee, which I expected, but why did that .0038 get sent to a different address? Is this a blockchain.info fee for sending from their wallet? Is there a way to avoid this second fee? And why does my 'Estimated BTC Transacted' number only show .1486? This is the amount I sent minus this extra destination-I'm just not clear on where that went...

Thanks in advance...

[1715526460]

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[1715526460]

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[1715526460]

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[odolvlobo]

That address is called a "change" address. That is how bitcoin works. Your wallet controls that address so you haven't lost the bitcoins.

Read this:
https://en.bitcoin.it/wiki/Change

[btc3769]

Aha-that makes a lot of sense, I was just worried there were odd charges in there I didn't know about-perfect-thanks!