No. It looks like post #27. R6, 7, 9, and 10 are 1K, R11 and 12 are 1.5k. According to the AC V setting, both outputs chatter which makes sense as both comparators are connected to the same thresholds. But as the relay circuit is not connected to the feedback circuit, where are you heading?
Since reconnecting the feedback circuit to the other comparator would be VERY difficult. So I'll disconnect R7 from R6 and connect it to R8, but I highly doubt it will make any difference.
Update: No difference. I moved R7 from R6 to R8 and floated the inputs to the second comparator. It doesn't matter if R7 is connected to R6 or R8. When Vin is between VthLo and VthHi, the relay, LED, and output chatter. If I have time and they have one in stock, I will get another optocoupler tomorrow. I will wire the LED in series with the first and reduce the pull-up resistor slightly to maintain 5mA. I will set up the output of the second optocoupler inverted to the one that is already there. Then I can do away with the other comparator. It will simplify the circuit, but I doubt it will solve the problem.