[Tha Stunna]

There are rare situations, against extremely tight players, where you can raise with nice upcards and generally get them to fold on 3rd or 4th. Unless you have a very good specific read on this player, it is a bad idea to attempt this type of play.
The raise on 5th is a good idea, villain has two pair and will call your raise and check to you on a later street.
6th is fine, although I was skeptical about it. If villain has one pair somehow then you aren't giving him a free card; don't expect a fold though if you're beat.
7th is almost certainly throwing money away by betting, but its not as much as it seems because villain will bet after you check a reasonable amount of the time.