I expected 2.3 to go through, and I expected it to fail. At the time, my suspicion levels of eH were already raised, but I knew it wasn't the time to come out firing.
eH, you made one big Red Flag raising case Mission 2:
Obviously, a spy does not want to vote his partner onto a mission (that is, if Robz was 1 of 3 chosen and you were not, it would look bad for you to vote it through knowing it will fail), thus you never did. But you spent all of Mission 2 trying to get someone to do it for you. You kept talking about how good you thought the team was, and that you were right on the verge of wanting to vote. Had Morgrim come along and passed it, you could've tried to soon him as a spy partner.
Now, I DID vote it through the second time, but it was calculated to learn something. I had failed (at that time) to notice that Robz was also on every vote you liked with TINAS as well - but pass or fail at that point, I was sure you were a spy. One 2.4 passed clean, and I went back (and saw Robz everywhere you liked), it came together quickly. I was confident of the spy pairings during all of Mission 3.
Your long-con game didn't factor in much at all. It was mostly conceivable, although not with these players, and not given past events. Morgrim was clear because I actually think he's a smart, but honest player. WoG was clear because I would've been SO easy to frame 2.4
So yeah. Robz by himself generated only mild suspicion (for NOT being Robz), but I was really led to him by eH, who I pegged around 2.2