I just did full website.net to website.com 301 redirect. When I was adding website.com in webmaster tools and telling google that .net address moved to new location, I was promted to add and verify website.net (before only www website.net was added).
So I added it, set www. version as prefered and now I see that both have been set for the move.
My question is, shall i remove request for the non www version or just leave it as it is ?
Anytime you do an "Address Change" they will ask you to verify both and setting one sets the other. You can leave them as is, there will be a site "account" for both www and non-www and both .net domains will point at your preferred .com domain.
You'll want to keep your historical records? Change the .net to .com if it lets you - it's been a while since doing what you're doing and it's hard to remember if analytics lets you change the domain on a site you're tracking.