After seeing his recipe, I'm inclined in that direction also.
OP, a couple of things. Your liming agent should be ~1cup/cf. You have 1/4 cup of OSF for a bit over 2cf. No surprise the soil pH is 6.2 and likely the Ca is mostly consumed. Should have been ~2cups of OSF.
OSF is nearly pure CaCO3. Good stuff but does not provide any Mg. I use dolomite which provides both Ca and Mg and the 'Cal Mag' issue never arises. Plus I don't need to go hunting a Mg source. The dolo is also stupid cheap locally, being ~$4.50 for a 40lb bag. The same size bag of OSF is nearly 10x as much, to me, due to shipping. It certainly doesn't work 10x better, but, YMMV. It's way too late to add any now, but don't forget it when you reamend after harvest.
Checking runoff is nearly useless for soil pH. Do the soil test like ShLUbY detailed for you for a much more accurate picture. Even using test strips with this method works well. I use them quite a bit for a quick 'ballpark' figure and dig out the meter very seldom.
That's about all I wanted to add, ShLUbY has already asked other questions that I had and no need to repeat them. LOL, don't think there is any need for more phosphates when you reamend, that should still be covered.
Wet