MultiPlayer Saves

So I've been taking on my son online in custom multiplayer games and as we don't have time to play a whole game at once, we save and load. When we load the game, all tech is buggy. Our previous researches are saved, but the game resets us to level 0 and subsequent discoveries start at that level. In other words, I've researched up six levels in Civilization, we save and reload, and now I can research the next level in 1 turn instead of the 15 it would have taken if we continued playing. I'm pretty sure this isn't what was intended. Anybody else find this? Any plans to fix?