I did mine exactly 60 days out. A and E was showing as standby only. So...I put my 4yo in an FP experience with us that she can't ride (like SM) then modified in this way:
I changed HER time only for Space.
I then modified ONLY HER experience...A and E THEN did pop up

so I changed that. It showed LOTS of times, btw. This was for June 2.
Then I copied her FP+ to our other 4yo (friend's daughter, they are traveling w us).
Now both 4yo girls hold FP+ for A and E without adults holding one. Not sure why adults need FP to meet the characters? I get the rides but meet and greets, no, unless they are meeting and taking time for photo op.
Having said this...this is exactly what I have on
MDE right now.
I don't know how this worked or why, but it did.