I think your issue is that you're needlessly antagonistic to people trying to help you.
But no, after testing it the Hit Points value is not current hit points. It's HP from previous Hit Dice.
Using your most recent pictures to explain, Guardians have a d10 Hit Die, so they get 10 HP a level from that. 10 (Hit Dice) + 3 (16 CON) + 25 (War Veteran feat) gives you the 38 shown for Max Hitpoints.
When you level up the game remembers you were a Guardian for one previous level and stores that 10 in the Hit Points slot. Since you're also Guardian for this level you get another 10 (Hit Dice) + 3 (16 CON) added to Max Hitpoints, giving 51.
TLDR: It's an artifact of how you can level in multiple classes, and is actually misleadingly named.