So one issue is having alot of unsent orders that failed to send.
Other issue is The time of transfer of storj to your wallet and depending on the price of which it was sent could effect the amount it ends up to be.
But you should check your unsent orders folder and see if you have alot of unsent orders that may have failed, which is why its showing the wrong amount.
If you have alot check this post here A lot of unsent orders