I cant reproduce these bugs, can you explain where and what you have tried. Can you explain more in depth what you did and what you expected to happen?
Bug 1: In the Character sheet, do you mean that the item do not show at all? You change equipped items you first need to unequip by pressing what you want to take off and then press the item you want to add. Will make this more intuitive in the future.
Bug 2: Do you mean the X button on top right does not work?