Pests or infection?

[Jenn4a]

Thanks!
When I first cut off areas that I assumed were fungal infections, the cuts appeared to be reinfected even though I applied alcohol and cinnamon on the cuts. It just happens that two of them that were reinfected were leaves holding the "gunk" that I cut off.
There's one leaf that looks reinfected, and the other one I haven't touched is new. It doesn't look like it is spreading as quickly. I wiped most of the leaves with copper fungicide.

During the repotting:
When I cut off the leaves from the base (gunky areas), I knew I risked spreading infections, so I used a dropper of peroxide on the cuts. Everything was bubbling fiercely... Even before cutting.

From a couple days ago; the halos are hard to capture.