Normal speed but very fast build/gather/creation speed?

Hi folks,

I just played a round of AoE 2 and something odd happened. I played a map with these configurations and everything seemed fine except that villagers seemed to gather and build everything faster, creating units was also extremely quick. The game speed was set to 'Normal' and movement-wise, the units moved at a normal pace.

So what happened here? Was it a bug? To be honest, I kind of liked it. It's not too fast to micro but also doesn't take minutes to get up and running.