Creating a form with "Blocking Mode" isn't fully blocking.

I'm seeing some very strange behavior clicking certain menu items in Allegro
after opening a form with blocking on.  I'm wondering if the is a way around this.

I create the form using:  ConnectivityForm = axlFormCreate( (gensym) formFile nil 'connectivity_form_Action nil)
But if I select the "Info" button twice, or the Display->Highlight button twice, it just seems to go beserk.

The "Current Active Command" and the "Application status" on the very bottom left of the window just keep
flashing "Idle" and "Ready"  while continuosly changing the Application status from red to green.

Has anyone seen this before?  Anything I can adjust?  Want any possible selection functions blocked.

Thanks, All help greatly appreciated.  I can't have a user encountering this sort of behavior.

-Mike