After learning all codes, I recommend downloading the file and doing a visual test of buttons, right then and there (you don't need to be by your devices).

By that I mean, when a code is captured correctly, you can press a button briefly or for a long period, and the transmit icon will indicate exactly how long you've held the key for. But when a code is learned wrong (not necessarily due to anything you've done - it's just flaky), a code may only cause the transmit icon to flicker briefly, despite how long you hold it down, or it may stay lit for longer than you hold the button (looks laggy). In those cases, those buttons need to be relearned.

It may take 2 or 3 cycles of this to get everything correct - and at that point, it's time to go test them on the actual devices!