We, too, have a similar Schlage model (same programming process). I was wondering, Morticia, what the big deal was about changing the code, then I remembered your lock is like the one we have on our private quarters. That lock is a pain.
You might want to consider changing locks. We only have 4 rooms, but honestly, it's so straightforward to change the code, pretty much as soon as I see they're out the door, they get five minutes (or less, if I'm busy), and that code gets deleted. Because we have so few rooms, I give each guest a code specific to them and we haven't had anyone forget (yet). But even if guest-specific codes weren't an option, the add/delete code process is simple enough to change codes weekly..