Hi - ok that explains the blood, I get the same however mine in part are also due to using Ljumjev which has a preservative which irritates the site and then cause blood to leak too, there isn't a solution to my knowledge except site change and perhaps revert to a manual injection to counter the high reading, as it's easier to just go with a manual insulin correction rather than wait for the new set change. It's really just about vigilance in watching levels. The only issue I think I would have with legs is knocking the sites which can cause irritation on the site, have you tried lower abdomen too ?