Installed Catalina on a brand new iMac. Got it only because I wanted to be up to date with my phone's software – been using Apple products for years. Opened the new reminders on Catalina and it pulled up every reminder I've ever done in my life… thousands of them. Assigned them to random lists. I have to go through each of my lists line by line and delete all of these completed and outdated reminders. What else can I do? I wish I hadn't upgraded my phone. I wish I hadn't bought the computer. Sorely disappointed. Any advice would be greatly appreciated.