No one is trying to make you feel like an idiot, but to be honest your post was rather hard to decipher what was going on.
I wish I had a dollar for every time we've heard "I do this every year (whatever that might be) and have never had an issue". In your mind, everything is the same, but in reality the one factor that is constantly changing is the size of your fish. And fish can jump out of a body of water that's 30 feet deep - they jump from the surface, not the depths.
You have to decide if you want to keep bringing your fish inside or leave them out all winter. Either can be done - you need to decide the route you want to take. But I can tell you this - a winter pond requires no fooling with pH or water changes. You can pretty much winterize and leave it alone. Many of us do it in temps that are just like yours.