While Testing the implementation rule order to stack different values before sending the beacon props and eVars seem to work as expected, but the event's string, although it appears stacked on the debugger, doesn't send all the events when the server call is triggered.
Below is the first rule, order 10, which sets a bunch of props and eVar and also event45
Below is the second rule, order 25, which sets some other of props, eVars and also event4,event24 which appear stacked with the previous event45
Below is the beacon that was sent, order 50, with only event4,event24
I'm not sure if that's a bug or there's a reason all the events are not being stacked.