Adjust (synchronize) your PC clock using some of the internet time servers and you will not have that time difference
Did you try setting the "Directional" parameter to false?
No need for a test (although I am doing it too :))
It will be solved
Use the attached one (a bit different, but all in all, when the changes that must be done would be done, they would be the same)
PS: as any fractals indicator - it recalculates/repaints
That indicator is alerting on those levels cross
Parabolic SAR of Kaufman AMA with a full set of alerts posted here : https://www.mql5.com/en/forum/177358/page16