Values for hud.anchorPoint
TOP_LEFT, TOP_CENTER, TOP_RIGHT, BOTTOM_LEFT, BOTTOM_CENTER, BOTTOM_RIGHT

Only TOP_LEFT works.

Config just isn't updating

Yes same issue, plus how do I only get the bar above the mobs and not the dialog box thing?

Type and enter this %appdata%/.minecraft/config at Win + R

Then find the torohealth.json
Then change the code to be like mine:

{
"watchForChanges": true,
"hud": {
"distance": 60,
"x": 4.0,
"y": 4.0,
"scale": 1.0,
"hideDelay": 20,
"anchorPoint": "TOP_LEFT",
"showEntity": true,
"showBar": true,
"showSkin": true,
"onlyWhenHurt": false
},
"bar": {
"damageNumberType": "LAST",
"friendColor": "#00ff00",
"friendColorSecondary": "#008000",
"foeColor": "#ff0000",
"foeColorSecondary": "#800000"
},
"inWorld": {
"mode": "WHEN_HOLDING_WEAPON",
"distance": 60.0,
"onlyWhenLookingAt": true,
"onlyWhenHurt": false
},
"particle": {
"show": true,
"damageColor": "#ff0000",
"healColor": "#00ff00",
"distance": 60
}
}

But for the anchorPoint set value it to whatever alternative other than TOP_LEFT ('cause it's not working beside this anyway).
Restart game. Done.