As part of my training management software I've created, I use a form to complete Active courses. 

The form contains a lookup for all courses that have 'Active = true'. 

The form works fine until I click submit and the course is then set to 'Active = false'. The form clears/resets but when I select the lookup, it still contains the record that I've just completed. If I refresh the page, the lookup then works properly and this record no longer appears. 

Is this a flaw with the system or am I doing something wrong? If it's a flaw, is there a way of closing the form or refreshing it? As annoying as it is, I don't want the user to select the same record again.

Thanks
David.