I went back to my documentation and found how/why the url got changed.
The issue I had was the speed and it seemed that was caused by "novecento" font. I found in this forum a suggestion to add to add the full path to the font in the file variable.less under less folder. It seemed to have fixed my issues at that time (the installation was in a subfolder).
But I still don't think this is the issue why the files are not generated or why they are added in that huge number. It's taking 300 Mb of the disc.
@font-face {
font-family: 'Novecento';
src: url('../fonts/novecentowide-normal-webfont.eot');