No apologies necessary man, it's a learning curve and it takes time. I've been at it a year now and it took months to even feel kinda comfortable with what I was doing. Much better now...
Those don't look bad at all. Here's a little equation you can use for runoff, but keep in mind it's not dead accurate or anything. You would need a good soil Ph probe for that. Anyway...
Examples: 6 in and 7 out...That's a difference of one and since it got HIGHER from the original then you need to ADD the difference to the runoff. SO. 6 in and 7 out, difference of 1. 7+1=8. So your soil's Ph is somewhere about 8 Ph.
Another example when it drops: 7 in and 6 out. Now here you want to get the difference but SUBTRACT from your runoff instead of add. So difference of 1. 6-1=5. So your soil's Ph is somewhere about 5 Ph.