HI Alison -
You will want to run a batch campaign, not a trigger campaign, to capture the folks who qualified but did not run through the program earlier and move them to the correct status.
Create a smart list to see who has filled out the form, then drill it down to see, who has filled out the form but campaign status is not updated.
Remember that you want to put folks in the right place based on their most recent behavior i.e. if someone clicked, you don't want to group them into the open status, since their most recent behavior is greater than an open.