Lindsey there's a big black spot on the base of a leaf in your second picture. I'd excise that one and go nuts with the cinnamon on the cuts. Looks like a fungal problem that's spreading pretty fast!
Btw, are those your fertilizer packets up above the plants there? They're really huge! Mine are about a teaspoon of fert per packet for each plant. They could be releasing a lot of fert at once to your plants.
