Sold Three Stocks, Why is Market Value Double the Price of Total Netted Value

Unless the stock price doubled suddenly, this makes no sense, and is simply an error in their website / display. Maybe the program is written dumb enough to double count the sold stock.
Either way, it will go away after some time, so no worries.

Unfortunately, this is not uncommon, many of the large brokerage houses have some incorrect data display right after a trade or during settlement period.
For example, the eTrade app shows for several minutes if not hours the outdated cash amount after you bought something, so it looks like you still have the cash plus have the shares. At Vanguard, the money disappears on both ends - so you see too low totals - and comes back after hours. And so on.