It sounds like you did not save the “first one” properly. When you choose Save As, it does not save the current project before saving as the new project. That is normal by design; all programs operate that way. If I did not understand your problem you need to explain it better by including exact steps. We cannot fix anything unless we can repeat (reproduce it). How can I do that? I do not understand from your description. Try repeating it yourself and note the steps.