Yes, most of the time it is possible to enter hours after the trade has been posted, sometimes even the next day. Of course the entry will depend of the underlying price - if the price moved significantly, sometimes the trade price can change as well. But for the most part, those are very slowly moving trades.
The implementation is very different from the previous one. Yes, June 2024 performance would be very different from the previous implementation. In fact, it is possible it would actually make money in June 2024.