yesterday i also have the same problem, but I do not have time to screenshot and have no proof, Chronology, I am trading, estimated balance to dollar 9300 $, and when it sold its balance it only became around 8700 $, because of the estimated $ error balance, but why can the difference of about 500 $.
The estimated balance is just based on fluctuations in bitcoin's price, which moves wildly all the time.
To actually check whether your trades have gone through, go to orders, and then "my trade history".