Quick Question about JSB Cathedral

[shade]

(actually 2)
-the Civilopedia says it only works on the one continent it's build=> is this true???
-It should make 2 unhappy citizens content
==>are these only unhappy citizens you have in the top bar,or is this for the citizens tout court?(used cheat to test the later=> before building in a city the happiness info says 6 unhappy and 5 very unhappy(this is at zero level for a size 11 city) and after it stays the same)

In other words I'm kinda confused,I know what it should do but it doesn't seem to be so.

Shade
(btw I know these questions look stupid but I really need those effects when I'll build JSB)

[Xin Yu]

All 'continent' wonders actually work for all cities, even those on other continents.

JSB makes two unhappy citizens content. If you have a double-unhappy, I think you only get one content from the dounble-unhappy. A good thing for JSB is that it is counted last - after unhappiness from troops leaving city. So in Democracy it is very useful -- each city can have one unit out of city and still celebrating WLTKD.

[shade]

thx,I see where I got troubled,I had enough improvements & stuff to get rid of all unhappy so that's why I didn't see the effect.
(I just did a quick check,didn't look that hard so I got confussed)

Shade (have class now)