What is up? It also won't allow me to upload a screen capture again. That happened a few days ago but resolved itself. I know I have an old browser and computer, but it's never been an issue before. Has there been maintenance on the site lately? Weird...
The problems you report are not common. I use multiple devices every day and haven't had those issues. Two of my PC's are quite old but all apps are up to date so no problems to speak of.