Thank you for posting! I am sorry things are not working as expected while using your TBT3-UDV docking station and I would be happy to help.
The behavior you describe is certainly not typical or expected, so our next step is to get some additional information.
If you would, please keep the dock connected to your system and send the output of our diagnostic utility PlugDebug --> http://plugable.com/support/plugdebug to us directly via firstname.lastname@example.org with 'For Ticket #283713" in the subject line.
This will allow us to match things up and examine some log files from your system to help determine the next steps. Please also include the Amazon Order ID number for the TBT3-UDV purchase in your direct email.
** Please do not post either the PlugDebug or Amazon Order ID number in our public forum **
Thank you for giving us the chance to help!