How are you typing じぃ? In order to get that, you’d have to type something like jixi. Typing ji by mistake would give you じ, not じぃ (not that that helps you much since it’s still wrong). The fastest way to type じょ is jo.
You can use this script to undo wrong answers, but use it with caution. If you use it too much you could completely ruin your learning experience.