I've made a perfectly shaped B-Wing starfighter, but I saw an error and pressed the undo button. I hope the problem goes away but it gets even worse, The shapes I made are back to normal into squares and I tried to hit redo but only a little changed and my hard work was gone

• I cant speak English very well so i use Google translate, I hope who ever noticed this understand what i am telling.

Also here a photo of Garuda Indonesia 737 taking off because this forum post is short