The metal LV buttons on my nano speedy were also slightly crooked. Someone on IG said her husband pinched them with his fingers and was able to straighten them! I haven't tried that though.
My nano speedy also had a few flaws, which is frustrating -- the buttons were crooked, the vachetta on the sides is asymmetrical, the zipper doesn't line up perfectly with the side tabs, etc. All seem to be common issues from what I've seen in this forum and on youtube...but I've accepted them since I love the bag so much!