Before the updater in dash, my darksend balance was +1500 darkcoin, after the update in dash.
I just copy my wallet.dat into the new folder dash and started the client-qt dash.
20 dash in my darksend balance !!!
Now, darksend starting for to mix 10 dash and after 5 hours 0 dash in my darksend balance!!!
What's this technology

Always the same message: Submitted to masternode, waiting in queue......
Monero, SDC are directly anonymous
At the end of the day you still have all your coins. Udjin explained to you why there was an issue, it happens, try to restart the process no need to disparage DASH for this ...
No off course, after my update my darksend balance is not the same, and now the darksend mixing never stop....
But all is ok, Dash is the best...
Darksend was upgraded hence the change in your darksend balance (coins that have been privatised) your normal balance is fine.
I've read further on dashtalk and it's to ensure the rounds are accurate. You'll have to remix. Annoying but if the mixing is better it's worth it no?
Try change the amount you are mixing. Or Send all your coins to one address. Just to kick it out of whatever go it stuck.
And send your logs to the devs or post on dashtalk.
Nobody is saying what you are experiencing is fine. But you could help improve whatever edge case you are experiencing by doing the above.
Mine still mixing. And appears all good.