IsapiRewrite rules generate strange pages/folders? - isapi-rewrite

Question

i'm using IsapiRewrite from helicontech for my custom classic ASP shopping cart.
My actual httpd.ini file is:
[ISAPI_Rewrite]
RewriteBase /
RewriteCond %HTTPS off
RewriteCond Host: (?!^www.domain.com)(.+)
RewriteRule /(.*) http\://www.domain.com/$2 [I,RP]
RewriteRule /httpd(?:\.ini|\.parse\.errors).* / [I,O]
RewriteRule /(.+)-([^-]*)-([^-]*)-([^-]*)\.html$ /detail.asp?brand=$1&model=$2&id=$3&lg=$4 [L]
So i'm actually using this component only to rewrite the product detail page in a nice way.
Lately looking in google cache i find some folders with files inside cached by googleBot that doesn't exist on my server eg: domain.com/carrera-CHAMPION ... and so on.
The page drawn if i access these strange pages is the detail.asp page but without css and some js loaded.
I tested recently the site with Acunetix scanner and seems like he found too these strange folders.
First i added a javascript check to se if Jquery not loaded then that means the page is one of these so i throw an alert and redirect user to homepage ..
Do you know what could be ? or how i could solve this via a rule in httpd.ini?
Hope i make myself clear if no feel free to ask me details,
thank you

Answer 1

Can you confirm that when you disable ISAPI_Rewrite these strange pages/folders disappear?
Please note that ISAPI_Rewrite only rewrites response headers and can't generate anything, so it's highly unlikely to be the cause of the issue.
BTW, your config is the mixture of ISAPI_Rewrite 2 and 3 syntax. If it's v2, please fix it like this:
[ISAPI_Rewrite]
RewriteCond %HTTPS off
RewriteCond Host: (?!www.domain.com).+
RewriteRule /(.*) http\://www.domain.com/$1 [I,RP]
RewriteRule /httpd(?:\.ini|\.parse\.errors).* / [I,O]
RewriteRule /(.+)-([^-]*)-([^-]*)-([^-]*)\.html$ /detail.asp\?brand=$1&model=$2&id=$3&lg=$4 [L]