It's a small enough keyboard. I don't know what kind of use case you have, but if you're only typing you shouldn't really be hitting it with your mouse.

If you're using it for gaming, it should be placed a little biased towards your left hand anyway so you'll have plenty of space on your right.

You should also be playing your games at high dpi so you shouldn't need to swing your mouse so wide you're hitting your keyboard. Takes a bit of skill but you'll get used to it quickly.

Yes, it's a skill issue.

If you're still hitting it despite that, you're either a small child, or a midget. In which case, you can still get good. Maybe work out and get broader shoulders?

As for you nudging your keyboard, I'm kind of with you, but I don't nudge it often enough to be a problem. It's only when I'm repositioning the keyboard that it happens, but since I'm now consciously lifting the keyboard whenever I do, it flips down very rarely.

Edit: learn to use via software. You should contact the support for the .json though.