Disappearing treaties... bug?

[serpwidgets]

I've been noticing a pattern, where some race will offer a treaty, I will accept, then the next turn, or within a few turns, they will offer the same treaty. I then check and we have no treaty.

In the most recent instance, I had a partnership with a neutral race, and they then offered a Trade Alliance... I checked the treaties and had none with them. UGH.

Also, is there some variable for each AI race like "Max treaty levels allowed" where every treaty they have with someone counts for X points and once they reach the max they won't make any more treaties? I had the Terrans declare war on me, we never fought cuz we were so far away... and then they got around to brotherly and stayed there forever, but they would never accept any treaties I offered, from non-intercourse all the way to partnership.