That all looks pretty darn good to me. As you saw, no spikes from food, all in the normal range.

Our profiles are somewhat similar, and my Hba1c since being LC have been 5.6, 5.7, 5.9, 5.8 and 5.8 again this past month. To me that is an indication as Chris Kresser wrote that my red blood cells are slower to turn over than someone with higher blood sugars. (Post #9) Rather than panicking over a "pre-diabetes" number based on people who eat a SAD with higher BG excursions, I have a doctor who reminds me that that those normal lab ranges may not apply to low carbers. And another doctor, who after seeing a history of blood tests, just says "that's Your normal." No worries about such minor points. Dr Richard Bernstein would panic over these, but other markers are fine.
You can also check your daily BG (all good), use Trig/HDL as the poor man's indication of insulin resistance, and best for all around health, aim for a waist that is half height or less.