Electrical Gremlins

2000 F150 4.6L electrical gremlins! it started a couple of months ago going
down interstate.i had the A/C Heater blower motor on (just fresh air). i
looked at my charging hand and it was going upwards,not normal,cause i
eyeball gauges constantly.i turned the blower motor off and the gauge went
back to where it is supposed to be,i'm doing 70 mph and turned the blower
motor back on,then all panel lights came on and felt a JERK,turned blower
off again,all lights went off and seemed to be normal again,so i kept on
going on interstate. went 20 miles and checked voltage on battery
terminals>> 12.6 volts with truck off,14.22 with truck running? had an
Autozone Alternator on it when this happened,so i still had my factory
Motorcraft Alternator that went bad a few years ago,so i replaced the
regulator,stuck it on the truck(output is 14.22 vdc.NOW,it's doing the same
thing as the alternator i took off? when the hand does start moving up,i can
roll up the windows and when the windows reach the top(closed position)
the two switches (either one)makes a noise(buzzing/humming) noise and
all lights blink, gauges flicker,battery light comes on briefly and the
overhead outside temp lights cut off,then come back on? if i turn the blower
motor on,the charging hand goes up higher? it does not do this all the time.
i can ride around sometimes with the A/C full blast,and everything is
normal. i do have all speeds on the blower,so i am ASSUMING the resistor
is good? also sometimes the charging hand moves upwards with
NOTHING on except the engine running,not much, but does move up a
little and flickers or hand jumping just a little. i am lost and need help on this
one. also,i did take it to the ZONE and had the battery/alternator tested
with their hand held tester,and ZONER said all good? so i asked him to test
charging system again a few more times,then machine said bad regulator?
HELP! battery has never went dead or low enough to NOT crank the
engine,starts every time?