address changed, transaction disappeared

[jens]

Hi, newbie here, first post.

I had a few bitcoins in a wallet on my PC, but syncing blocks took too much time and space, so I wanted to move them to Coinbase.

I am on a Mac, using Bitcoin-Qt.app, version 0.8.5.

I first sent a little to a Coinbase address, to see if everything worked fine, and then sent the rest. Here are the transactions as recorded by Bitcoin-Qt.app.

Status: 0/unconfirmed
Date: 02/01/14 17:40
To: Coinbase 15shuJxuw2kwfJRfPmLapjXrPpa6Ho5k6G
Debit: -0.491 BTC
Transaction fee: -0.01 BTC
Net amount: -0.501 BTC
Transaction ID: 02515234bc84e74f38ac308967b4a172f220b53f4e1ee6acf257e2f659b1dc7f


Status: 0/unconfirmed
Date: 02/01/14 17:43
To: Coinbase 15shuJxuw2kwfJRfPmLapjXrPpa6Ho5k6G
Debit: -3.98 BTC
Transaction fee: -0.01 BTC
Net amount: -3.99 BTC
Transaction ID: 9fc9884e744034ec5d3b32f60be52c1f8c6b76cfc6474565289105a9d4004524

As anyone can see on blockchain.info, there is no transaction 9fc9884e744034ec5d3b32f60be52c1f8c6b76cfc6474565289105a9d4004524. The bitcoins went off to another address, 16CiidBwtR9CTVXGDRtB1wYwCW7VARwPux.

The initial transactions in the two wallets appear to have taken place at the same time, 2011-07-08 14:23:29.

Can anyone tell me what is going on?!?

Cheers,

Jens

[BitThink]

Most likely that's the change address. When sending out some btc, The Qt client will create a new address and  send change to this address. You will see the change after you finish syncing all the blocks.