@Pushrod Monkey more and more your diagnosis seems reasonable. At this point it could just be two problems.
@Nataskyywalkinn which fungicide product did you use? I think you are in a hoophouse. Make sure you are spraying the plastic and the floor. Leave a raised lip matt in front of the doorway with a light
hydrogen peroxide solution step on it before entering. Get a cheap set of coveralls, put them on before entering.
Examine your surrounding areas for trees that are most likely the culprit for spores. Spray the tree line perimiter if you find evidence of leaf septoria.
If the breeze blows into the hoophouse make sure you are applying preventative fungicide durring cool damp nights.
Use a sticker spreader such as NuFilm and spray in the evenings. Ideally after dark.