How to avoid this?

[tonibarcelona]

mmm. what effects do you think that may cause? Worth than to have more than 30 main pages (every day the number arise) indexed??

[banswidthjunkie]

Yeah, I really wouldn't worry about it. If you are searching for your URL then all sorts of odd stuff can get indexed. What you want to worry about is tuning your site so that you get ranked on specific search terms, not a few multiple pages.

[tonibarcelona]

Many thanks for your code.
Finally, i added a file (xxxredirect.php); calling it into index.php, and for now (maybe tomorrow i detect some contraindications), all seems to be ok.
I included at xxxredirect.phph a redirection from www.mysite.com/shop/index.php to www.mysite.com/shop/ too

Many thanx