S. tectorum - Catalonian houseleek

S. tectorum is wrongly named Catalonian houseleek here:

http://hribi.net/rastline.asp?lng=1&id=88

It is a Slovenian page, unfortunately photos are only showing flowers, no rosettes...

The mistake is "repeated" at thi page:

http://www.zaplana.net/flowers/asp/display_flower.asp?name=Sempervivum%20tectorum

I just don't get it where they get the idea S. trectorum is called catalonian houseleek in English.