I truly hope someone can shine some light on my stupidity...
The situation: With limited knowledge, I added my site (non-www) as a property on GWT. After verifying, I deleted the html file from the server. Three months later, realized my mistake, but only after adding a new owner, verifying again, then deleting the site, then adding the site again (www), then adding/deleting an owner multiple times, verifying multiple times... Thus, to conclude, my verification history is messy messy on both non-www and www, and on both (two different) Google accounts.
The now: I've deleted the property(ies) on both Google accounts, thus, there is nothing on both accounts.
The Question: Will the property (verification) history be cleared after a "grace period" if you delete the property from your Webmaster Tools account? (No properties are created, no html verification files on server - Google will not try to verify, nor can I use GWT.)
What I want: I want to create a "clean" property, with no messy verification history!