Cookies on Computer list

My Cookies on Computer list contains what I'll call: "double naming".

For example ... www.youtube.com & youtube.com

This is just one example of many. To my untrained eye it adds clutter and adds time to maintaining my cookie list.

If it's necessary, it's necessary ... but

What is the reasoning behind this?

'Cookies on Computer' is only reporting what cookies are already there, it's not a question of necessary or unnecessary it's simply what someone (eg, Youtube) has already put there.

It would be an issue if CCleaner didn't report all the cookies that were there.