Bug: v1.20, can't trade technology

Hi,

I've started a new game with 1.20 and the 1.01 Balance Mod, as humanoid, rock/oxygen. Found 2 races, one living on ice the other on gas planets. They have both exchanged their colonization techs and can both colonize the other's planet type. I decided to try and get both techs from them.

I send a message to each, swapping my rock colonization tech for one's ice and the other's gas colonization tech. The next turn the log shows the correct message about the trade requests that I have sent: Rock for Ice, Rock for Gas. Next turn, the same log says that I have successfully transferred the ICE tech to one and the GAS tech to the other, and have received ROCK from both, unfortunately it is not more advanced than whar I have and blah-blah-blah. It's not just a log problem, if I check the Research window I still only have the rock tech.

I've tried this many times with the same result. I've also noticed that sometimes when filling up the 'Want' panelin the trade window I am given my own techs list and not the other race's.

I could only see this when trading for the other races' native colonization tech. When I try to swap my rock tech for the colonization tech that the other races have traded for themselves, they refuse.

Any one else saw this?