Glad it’s going so well for you, and glad you have a grip on making adjustments.
Just remember to give those basal adjustments a bit of time before you change them again. There are so many other variables beyond food/insulin that changing the basal because of a one-time problem, or even a pattern over a few days, can often be unwarranted. Rule out other factors before you conclude the basal is the problem.
I dunno. Sounds like that’s using basal to cover food, which can be risky. Once you’re comfortable with your tweaked basals, test them by not eating. You should stay level. (You know this.) Then when you want to snack, use BOLUS. (You know that, too.)
Never. One can always learn from others’ mistakes others’ experiences. 