[not sure if a bug] Happiness reaching limit doesn't increase golden age turn count

[Saucy Jack]

So the title sums it up; I'm playing as Siam using the GEM mod with G&K. I'm currently in a golden age, and the mod allows the happiness counter to continue to increase while a golden age is in effect. What I'm seeing is that, if the happiness counter rolls over while a golden age is currently in effect, NO turns are added to the current golden age, meaning a) all that happiness was just wasted for nothing, and b) the amount needed for the next golden age still increased, screwing me over twice. Is that supposed to happen? Or are new golden ages earned while old golden ages are happening supposed to add to the turn count?