You're in two different directories in the two examples.
In the first, you're in a "src" directory. In the second, you're in a "Desktop" directory.
Does the binutils file exist in both directories? If not, you need to provide the full path to the file to untar it in your first example. Something like:
[lfs@localhost src]$ tar xvjf /your/path/here/Desktop/binutils-2.13.2.tar.bz2