Today I opened one of my click bank accounts and noticed sales on my sales analysis report. I was surprised to see so many sales. When I checked again the information was gone. Now I realize that people are able to steal commissions, so I encrypt my URL links the best way I can. Obviously I am not doing a very good job with encrypting my URL links.

If the sales displayed in your ClickBank account and then disappeared, that would not have
anything to do with theft of urls. It would have to do with ClickBank and it sounds like it was
an error or momentary bug at ClickBank. You could always contact them and ask.