Welcome to the forum!
When you said that you covered your cheeses with bowls, a warning light went off. I think the humidity was too high for the initial drying of your cheese, which is probably why they went bad. While too dry is not good (it can cause cracks), too moist isn't good in the first few days with a cheese, as it needs to expell more whey yet.
I don't have a dedicated cheese cave yet, either, so from October to April, my cheeses reside in a cabinet in my basement, which is about 50-55 degrees for most of that time. When the weather starts warming up, my cheeses go into the spare fridge. I vacuum seal my cheese after about 4-6 weeks of drying.