Unfortunately the acknowledgment email doesn’t reference both PCNs.
When you say game over, does that mean i have to pay? the full amount shown on the letter, this is such a high amount, i don’t have this kind of money 
Firstly, its your reps we need to see, as they would have mentioned two PCNs if you'd submitted reps covering them both. Councils do make mistakes, so check.
Secondly, (on "game-over"), unless someone here comes up with a "wizard wheeze", the amount can only go up. TEC registration £10, then bailiffs, (1) compliance stage letter £75, and (2) visit to premises £235. These are statutory amounts, BTW. Then, if you don't pay, seizure of property, usually you car because its easy to find and seize.
Why don't you contact CoL and explain what happened, and that you are willing to pay the PCN, but the CC is a mistake on your part as the PCN was supposed to be listed under your representations. You never know, you might get a result.