Thats pretty much impossible to get the stock lubuntu desktop after the installation of LXLE. Perhaps your burned the wrong image? Do you have a screenshot of what your desktop looks like after the install. Have you restarted or relogged in after install?
Just guessing, did you choose the correct seisson from the login frame? The default look is the Lubuntu I guess. If you make it Lubuntu Netbook, you surely will get something else.
But, best is, share the screenshot like LXLE said.