'Choose great person' grants several GPs

Playing at summer cabin with a slow laptop, so the graphs lag a bit.

I built Hagia Sophia and when the Choose your great person -choice came, I could choose several GP's from the 'Choose...' button over the 'End turn' button.

Maybe it was because of my lag?

I‘ve heard the same BUG. The key is that before the choice comes, you choose one unit to attack an enemy unit. When the choice comes during the combat, you can choose multiple SPs.

Yep just had this problem playing Aztecs

First time I got 3 great scientists thought damn this is awesome. It kept letting me pick a few. I think it was from the policy modifier for completing Liberty. Then the second time I got it from the Hagia Sophia, and It was unlimited. I couldn't stop the cycle of Great people generation. I will try to upload a screenshot. But basically I had 150 great people on my map and got to modern era by 450AD. But coudn't find a way of ending it.

Can you post a save-game from just before and after you completed the Hagia Sophia?