Hi. T1s will normally be given what's called the Basal/Bolus regime (aka MDI Multiple Daily Injections) which uses two insulins i.e. a daily one (Basal) and a mealtime one (Bolus). This means 4 to 5 injections but 4 would normally be fine for many. Mixed insulin is a compromise but only needs 2 injections. The problem is you can't adjust the dose for variations in mealtime carbs so the control is not as good as Basal/Bolus. I guess the medics thought it was best to stick with 2 injections due to the disability. If you're happy, I would ask to move over to Basal/Bolus as it gives much better control although twice as many injections.