Friendly pages using htaccess...Do those page names carry weight?

[chopin2256]

This is a weird question, but I noticed something when I did a few searches on my site. My site consists of static html and dynamic pages. Lets say my page looks like this:

/key-word.html

When I did a search for "key word" in the Google search, /key-word.html was bolded like that. That is expected. Now, I also have user friendly pages for my wiki and forum. Lets say the real url is this:

/index.php?title=Main-Page

But the alias is now this

/articles/Main-Page.html

When I search for articles main page, I get this:

/articles/Main-Page.html

Only articles is bold, but why not Main Page? Does this mean Google does not take into consideration the page name of a "converted" dynamic page using htaccess? It seems that Google only weighs the page name if it is static...or perhaps this is just a bug on Google's side for not showing it visually by bolding the found key phrases. What do you guys think? I am sure some of you have user friendly pages to try this out yourselves.