How To Use Disc Burning Program

how to use the disc burning programows 7 home premium. I'm trying to learn how to use the disc burning program that comes with the system. I had some pics in the pic library and burned them onto a CD-R. First I tried dragging them into the blank space. That didn't seem to work. Then I simply selected pictures to burn and that worked.However, afterwards I had a problem. I took out some old discs of pictures I had burned previously using another computer (using Roxio Easy CD Creator). When I put these discs onto the DVD drive, suddenly I found that the pics that were supposed to be on the disc had disappeared, and that the new pics (which I had just burned previously onto the blank disc) were now on this old disc. I tried putting in a few more old discs and the same thing happened. The data that was supposed to be on the disc had disappeared and had been overwritten with new data that I had previously burned.

I noticed that I had a message whenever I turned on my computer, "You have images ready to burn." Apparently, the images I burned previously were still set up in the cue to burn again whenever I put a CD into the drive. And these CDs were CD-Rs, which aren't supposed to be able to be rewritten.