website URL query

[Mystro]

Guys

A friend of mine has just had this site built and is going to start some Seo he asked me to have a look at the site its self

I just clicked the pages and some are html and some are .jsp

why would he have to have the file structure below why could he not keep it .jsp or .html throught out with clean linking pages

http://www.perfectmemento.co.uk/
http://www.perfectmemento.co.uk/About_2.html
http://www.perfectmemento.co.uk/OurService_3.html
http://www.perfectmemento.co.uk/demo.jsp

what would be the reason for the _2 and why html when the rest of the site is jsp

I do believe he has some kind of CMS so he can upload text and such but still it looks odd to me

you should have seen what the pages were called before the change which he has been charged for by the designer

Used to be
www.perfectmemento.co.uk/page.jsp?pageID=3

changed to
www.perfectmemento.co.uk/OurService_3.html

 

[TradeSparq]

Shouldn't be a particularly large change since you can do a mod rewrite to do these all at the same time. Also it would be better to change it to:
www.perfectmemento.co.uk/Our-Service-3.html as dashes are counted as spaces.