OK... Should I be worried of my signature is not showing in my cbse improvement exam confirmation page?
If you have submitted the signature and everything then no need to worry about that. Primarily, there are some problems those occurs every year and gets updated with time. If you feel like unsure, you can contact the help desk of CBSE. You will get the info from the official website.
I hope this helps. All the very best for your future endeavors!