Vinny,
Its strange because our pool behaves very normally, as pH goes up so does Alkalinity and as you said it responds just as you and Windy said. Our tub is weird, I constantly have low Alk and high pH, I can literally put a scoop of pH down in it every 3rd or 4th day and then adjust the Alk on the weekend. I don't really get it, something about air injection. I just go with it and add a little of whatever it needs