[SickAttack]

Why are you even using OnPlayerUpdate for this? It's really unnecessary.

And this will be setting a timer every 20 milliseconds (overlapping):

pawn Code:

public OnPlayerUpdate(playerid)
{
    if(IsPlayerInRangeOfPoint(playerid, 8.0, 1702.24023, 387.75421, 30.00490))
    {
        SetTimer("DialogKufini", 3000, false);
    }
    else if(IsPlayerInRangeOfPoint(playerid, 8.0, 1698.76074, 380.91251, 30.11920))
    {
        SetTimer("DialogKufini", 3000, false);
    }
    return 1;
}