DAFNE is designed for insulin users who use a basal/bolus regime of insuline users... Where they have a background insulin (slow acting) like lantus or levimer and a Qucik acting insulin i.e humalog, Novarapid...
You say that you use insulin, what type/s of insulin do you use?
You mentioned that you inject before your're breakfast and took a BG 20 minutes later, which is really too early, normally you take a BG 2 hours after eating to see how the BG has reacted, you can take a BG 1 hour after eating this will give you a idea how high you levels raise before falling..
Other considerations is do you still take any type 2 oral medications, as T2 are resistent to how insulin is used in there bodies? This would have to be looked into as well.
WIth saying all that, how often and when do you test you BG's?
HbA1c's is a blood test that gives the adverage of you blood glucose over the previous 3 months, a non-diaetic would have a advarage of around the 5% mark, A diabetic should to be as near to this mark as possible but below 7.5%... But if you self Monitor on a daily bases ang achieveing good before and PP meals BG's then you will find that this will give good HbA1c's...