I can't duplicate the issue but I can see the issue in your signature. I would suggest clearing out your signature, save it, and then try again. I tested with your exact signature and I didn't have any issues. When you try it again, be sure to view the preview shown and see if it's appearing correctly there before submitting. If you still have issues please let me know what browser you are in, what version, etc. and we'll go from there.
There is nothing more important than this one day.