Change detection in PCIe 6509 in shared board

I have a situation where I have multiple applications sharing the ports of a pcie 6509.  This works correctly for static dio, However, when I set up a change detection, I can only set up on one application at a time, in spite of addressing a different port on each application.  Is this a feature or is there a way to do this?  I am interfacing using:

Daqmx 18.6

Measurement Studio

C#

Visual Studio 2017

thanks, Derek Hopkins