Yep! Pure mode used to be at 23 and Hybrid mode at 21.No.
Given we are in late spring, near early summer and you're in Texas to boot, I assume you've ruled weather out aka cold starts? I think that's been the only delta I've seen with mine at almost 8k miles. Also, this shouldn't make a difference either, but make sure you're also comparing the same drive mode, for example my car starts up at 21 miles in the dash in hybrid and when I switch to pure it bumps to 23 miles. Last thing to check would be to ensure your charger is not regulating at the upper battery charge percentage.
Which charger are you using? If it's the Turbocord provided with the vehicle it should not be an issue. Some other version I believe have settings that can be adjusted which is what to look for. For example my JuiceNet allows me to limit the amount of battery charge applied.How do you check the charger?