It was the first one we have seen in over a month on la Ropa, and we are out there every morning, very early.

It seems there have been a turtle release everyweek at playa LaRopa since mid December at least. People in charge are wearing zihua city shirts. They operate just before sunset. I was close by on December 13th (a Tuesday). They had more than a hundred turtles in their baskets. I saw another one the 19th (a Monday) and one last week, I can’t remember the day.
According to a trinket vendor we met last Tuesday at El Manglar, this week was supposed to be on Wednesday… no pattern.
If somebody knows where to find a schedule on the internet, please post the info.

There is no schedule, and there will be fewer and fewer hatchings over the next 2 months. I haven't seen any new turtle nests in about a month. Though they can mate and nest all year round, this is a slow time of year for them, and it's getting slower. You were fortunate to have seen the hatchings that you saw.

Are there more than 2 turtle releases in the Ixtapa/Zihuatanejo area? Ayoticalli, and Robrtos in Troncones?

Turtles are released all the time in Ixtapa by the hotels. But are rarely advertised.