The most likely problem here is that you have multiple assignments for the view change command set to multiple controllers hooked up to the system. They are conflicting with each other causing random view changes.

Firstly, go into Windows Control Panel and to Game Controllers. Remove any controllers listed in that box that are not currently connected or being used in your flight simulator.

Next, go into FSX, into the control assignments section...
Go through each controller in the drop down box (in the button/keys tab) and ensure only one controller has the assignment for view changes assigned.

I have the same set up and I uninstalled the sst software and it works fine now.  The saitec software was conflicting with FSX.