Can you give a link to supporting documentation for these?
I believe that #2 in your list is still a Sac Fly w/Error.
#5, if the hitter hits to where they should be out, but the defense spends too much time looking back a runner, I think you still have FC there.
Got everything from OBR.
#2 is not an error because of the fielder's choice force out. This is no different than if there had been no SF situation. For example, runner on first. Batter hits a fly ball to the outfield. Fielder drops the ball, picks it up, gets the force at second. That's also a fielder's choice, no error.
#5 - In NCAA, yes, but in OBR, no. OBR requires making a play.
From OBR:
Definition of fielder's choice (which covers #5)
The section on Base Hits also covers #5:
This covers #2: