I seem to be a little confused about Epcot's morning EMH. B-Ride said that guests are held until opening? What does that mean? If early EMH's begin at 8 am, what time are you actually let in the park to ride on attractions? Why would you only get one ride on Soarin?

Sorry if I'm being dense...I'm just not understanding what this means. Can anyone clear this up?
As I said in my post #11 in this thread (in regard to the same post you are questioning,)
Even though there can always be exceptions, my experience is that they
usually hold the guests near the Fountain of Nations.
There is a "timing difference" between keeping guests
outside the front gates until straight-up "opening time"
-OR- allowing guests through the front gates and then "holding" them at some other place inside the park to await the "Rope Drop" (which usually then occurs at the straight-up "opening time.")
It takes a long time for guests to file through the front gates, trying to use tickets and the finger-scanners, many pushing strollers and herding larger groups (many little kids) and some folks using wheelchairs and
ECV's.
If the CM's allow some of this "gate ballet" to take place well before (say, starting 15-20 minutes before) "opening time," it will allow many, many guests time to get through the gates and then line up ready to head directly to their first attraction with little or no delay at "opening time."
Again, it has been my experience (and I have quite a bit) that on most days (I'll even say, "just about EVERY day) early-arriving guests will be let through the gates early and held inside the park (yes, even Epcot)
to await the "Rope Drop" time.
And that info applies to both AM EMH and "regular" opening times.