In Garmin connect under a run the heart rate zones chart is using the wrong heart rates settings My user settings has zone 5 set at 153 pbi but when I look at my run intensity has it set it 176 bpm any ideals wine
Your running HR Zone table is based on the LTHR, which means the zones change each time there is a new LTHR detection. Did you check how high was the LTHR on the date of the concerned activity?
The resetting of the HR Zones has not retroactive effect. The activity will always use the HR Zones as they were at the moment of the start of the activity (it means depending on the LTHR value of that moment).
You cannot redo LTHR based HR Zone table (unless you mean you changed the percentages), since it automatically recalculates the zones using the detected LTHR value. And if you entered the LTHR value manually, then (although I am not sure whether it applies to your watch model too) the auto detected LTHR often overrides manual LT entries.
