I've been playing with the settings and getting used to how revive works. I changed my auto maintenance to cron maintenance and manually executed the maintenance script and increased the click count to reactive the campaign. I refreshed my page a few times and the banner reappeared :-) I need to continue to read the docs and change settings until I get the ad environment that works for me :-)
thank you @Erik Geurts and @andrewatfornax for taking the time to respond to my questions :-)
Depends on settings I think @dottedquad - there's an option to recalculate priorities of campaigns on changes, which I think it on by default... But it can be disabled, so if it's not appearing to work, check that setting.