Sin-Binning in Non-League Football

Seen my first football sin-binning today and it was the Home goalkeeper in the last minutes of the Frist-Half.
Several Questiions:

1 - Is added time included in the 10 minutes in the Sin-Bin?

2 - Does the Referee call the player back on whilst play continues, stop play to allow the Offending Player to return or wait for a break in play which may mean the player could be off for more than the regulation 10 minutes?

3 - If the answer to 2 is call the player back on whilst play continues as with a normal Substitution, how can this apply to a Goalkeeper as the Substitute Keeper has to revert back to his outfield kit and as they probably only have on Keeper's jersey, the original keeper has to wait for the Sub to take off the jersey and then put it on himself, all of which has to be done whilst the ball is in play.
In today's incident, it was made easy for the ref as he got to award a (dubious) penalty which the Sub had to stay in goal for despite the fact that most of the crowd thought it was after the end of the 10 minutes anyway. What was interesting though was that the Home Team kept putting the ball out of play so the change could be made.

 

No idea, but what warrants a sin bin?

There was a conversation near me today about having an orange card to sin bin players for the deliberate cynical challenges which stop an attack. Charlton were guilty of a few of these today.

 

Basically it's for getting in the ref's face. I've seen half a dozen Conference North and below games so far this season and today was the first time I've seen dissent towards a referee so something's working!