Cheryl @cheryldbrown77 , the idiosyncrasy I mentioned was listed in my last sentence - at times an “automatic correction bolus” appeared too high to me, driving my BGL lower than I wanted. It didn’t cause an over-treatment bolus because I was correcting lows with 4 grams of carb.
I presume that you mean that one cannot back out of the CC [Change Cartridge] functions - yes you can, unless you have already confirmed - by a second action - that you want to load a new cartridge. I suggest that you take a little more time and not try rushing through functions. Yes, it happens - on two occasions I made the mistake you apparently made, once when I wanted to check “fill tubing” when I suspected I wasn’t actually getting insulin.