you should be able to just run the installation of mambo through a browser window after you upload the files, i dont think it matters what you name the folder you upload it to.
the domain being very similar happens with names even if they arent 3rd level... i cant even count the number of times i have gone to jodhost.com by accident! ha
yeah the stats are crazy.. i also have using my own script to compare.. and they are all way different...
and the bandwidth measurement on both is absurd!