I cook my own mulch & soil from leaves

I've use the older brew as topsoil for lawn areas.
The base soil is called timber soil

I just tested an area I topped and seeded last spring to determine what
additives to apply. I'm getting a lot of brown spots. I spread a
fertilizer of 29-3-4 about 2 weeks ago to help w/ the nitrogen.

ph = 7.0-7.5
Nitrogen = Low
Phosphorous = Low
Potassium = High

Wouldn't soil from leaves be highly acidic? I believe the test shows mild
alkalinity, right?

Thanks,
Barry