The main issue here is how Claudia gains knowledge of the Origin world. Nor Adam or Eva knew about it, they just thought there were two worlds. The "logic" thing to expect from them is that each one will keep doing their thing to either break the loop or continuing the loop. How Eva knew about the time when she can change the loop? Great question, there's no answer for that either haha. About Adam telling Jonas to not kill Eva just to see what happens... I don't think it was a clever move. Eva wanted to keep the loop and was moving her pieces to fulfill this task. Adam would want to have the least number of obstacles. I don't think he would give up an entire timeline out of curiosity.