When you get way zoomed in while drawing stuff, it’s easy to lose track of scale and how much room you really have. I tend to use a stroke of .008” to simulate how much material is going to be removed, if paths will intersect, etc.
When you Save As SVG, click the More Options and set up your saves to look like this:
Also, the metadata was missing from your file, so I’m guessing you exported rather than saved. The official recommendation is to do Save As or Save a Copy.
I use export all the time and I haven’t broken anything yet, but you’ll need to go into the export options in Illustrator and set up the appropriate boxes.