It seems that it only makes one and deletes the other, always.
In any event this is what you do.
Make a system image, now. Put it on an external hard drive and forget about it.. Every month make a new one and keep it on the Hard Drive in the computer.
As time goes by you may need to use the image, because of a virus or your hard drive went down, either way you cannot or should not use the one on the internal. Wow, you have problems. Wait you made one and put it away.
You can use this for image. http://www.paragon-software.com/home/db-express/