Hi, I don't have experience with higher #s, but I know you need to leave for work soon so I am bumping your condo up for eyes to see.
Typically the +1 is higher/similar to the shot #, here is an example of what a curve looks like.
Are you testing for ketones?
Example of a typical curve:
+0 - PreShot number.
+1 - Usually higher than PreShot number because of the last shot wearing off. May see a food spike in this number.
+2 - Often similar to the PreShot number.
+3 - Lower than the PreShot number, onset has started.
+4 - Lower.
+5 - Lower.
+6 - Nadir/Peak (the lowest number of cycle).
+7 - Surf (hang around the nadir number).
+8 - Slight rise.
+9 - Slight rise.
+10 - Rising.
+11 - Rising (may dip around +10 or +11).
+12 - PreShot number.