Regardless of your actual "rightness" on this issue, potential future employers will only see this as a liability. The willingness to air dirty laundry against a previous employer is not seen as a positive attribute in most hiring processes I've seen.
Lawyer up, delete the post, hit the gym. (or something like that)
I just read it 4 times and I'm still confused.
It also seems like they (the company) want to draw his attention to the acquisition that took place. It sounds like a lot of contracts were rewritten during that time. Perhaps OP is referencing his original contract?
But then at the end it sounds like they settled with the labor commission, which would mean to me that they had either paid him out (via settlement) or satisfied the labor commission that their contracts and practices are sound.