Congratulations on the weight loss. That is great. It sounds like you have a bit of reactive hypoglycemia and this is evening out your a1c. You might try cutting back on the carbs a bit at meals. This will help prevent the spike and the subsequent sleepiness. The trick is to eat to your meter. After a known carb meal, test at the 2 hour mark and see what your sugar level is. If it is high you will know what needs to be limited or eliminated.
Dxd T1 1966, 2001 dialysis, 2002 kidney transplant, 2003 insulin pump, 2008 pancreas transplant