Your wallet shows you are currently holding 3.7 VESTS which are currently giving you equity of 777 STEEM (nice number!) in the network. At current price of 1.11 USD/STEEM this represents 862 USD worth of steem. Sounds about right for a 1.2 BTC purchase.

I guess the misunderstanding stems from the "Estimated Value" figure. This figure is not using the current price, but a moving average computed using the daily prices of the last 7 days. Since STEEM price has been appreciating very strongly over the last week, the increase isn't yet entirely priced in in the estimate. So what you are going to observe is that the estimated value will increase over the coming days. But it will always lag behind the market price.

My advice: don't look at this figure every day. Since it's lagging by about a week, the right time scale at which this figure becomes meaningful is that of a month. You'll get a rough idea of how your investment is doing by looking at it once in a while, like every month or so. Looking at that more often is pointless.

Edit: As mentionned by another poster, price isn't a moving average but a median. This doesn't change other considerations however.