I should add that I have been keeping an eye on my Spam folder.
Hi, yes, I think it is just a caching issue. For example, on browser (a), I go to the public facing booking page and submit the form for a booking date. On browser (a), the calendar doesn’t update with the booking, even if I approve it on the back end. However, if I open the booking page on browser (b), the booking appears on the calendar. Eventually, after some period of time, browser (a) also updates with the booking. This is probably more of a ‘me’ issue not understanding how WP caches and loads pages.