It sounds to me, again, like it is set up correctly. It is not unusual to have to "tap" the cam or cam arms to get them to go downward after releasing the chains. It may be just the bolt that holds the cam arm on the mounting bracket is a bit too tight. Either way, it should not be a big deal. In most cases, the cam will not swing down all by itself and usually needs a bit of "help" to move it. Looks like in your case it just needs a bit more "help".:W
By the way, I would continue to use the 7 links under tension if I were you. Looks like that gets you right in the ballpark for WD.
In the future, it is much clearer what you mean if you just state the number of links under tension. The term "hanging free" can mean just about any number as not all chains have the same number of links. "Under tension" leaves no doubt as to the meaning.
Barney