Quirk, why do you go direct to full sized pot rather than progressing through different sizes? Your method - moist soil and strictly hands off for ten days - is workable but don’t you miss being able to monitor the root growth by being able to check it during transplant?
The light leak question is more pertinent to indoors, the difference between night and day is not just about light but also temperature. The plants don’t need pitch black and ambient light from street lights, house lights is negligible in comparison to sunlight so the plants in a sense ignore...
Are you sure it is mound from rain, caterpillars cause the same symptoms.
Been oil spray can work, but as in post above you should just carefully prune infected buds and discard the bad parts. Might just be parts of colas you are losing.
After rains it if you can just give the plant a little...