Hi I'm T1 but been using a variety of monitors for many years.
First off monitors are cheap, they are generally given away by doctors, the suppliers make their money on the strips.
All monitors are not accurate, I think they have to be within 15% of lab values.
Glucose is not evenly distributed around the body, so not unusual to get different readings from different fingers.
I have two Libre readers, xDrip and finger prick monitor, All of which can give different readings with in a very short space of time. You just have to learn to live with it.
Your sugar readings do not, to me, seem that wrong, but I'm no medical expert.
Hope some of that helps.