Hey Karen, deactivating/activating again won't get people to flow through who have already gone through because this is a triggered campaign. The campaign will always be looking for one of your two triggers to occur before getting anyone to flow through.
You can do one of a couple of things to get these people to flow through your smart campaign again: the easiest is to probably clone your current smart campaign, in the flow steps remove the Send Email step (definitely do this, or else they'll receive the email a second time!), and change the smart list to a single filter that says "Member of SFDC Campaign" and your two campaign names.
Also, if there's a chance that someone is being invited to both campaigns then you're correct in having the Change SFDC Status as two different flow steps, but if they can only be a part of one of the campaigns, then you could do that as a single Change SFDC Status with two choices... totally up to you.