My apologies, but I don't understand exactly what you're asking. You just affirmed that you can have more than one person in your base, meaning you'll be able to pick several secret pals at once d:
I think what that meant is you can pick and choose people that you want to visit your base, yes. There was nothing said about a limit though, so can't help with that :[
So from the article you linked me, it says that your secret pals that you recruited will be in your base(from what I understand atleast).
So cclealry, there will be a limit to how many can be in your base, but do you think we will get to pick them?
Can't seem to find the actual image, but all of the major Pokemon websites, including Serebii and PokeBeach, have written articles about the trade mark, so if IGN isn't reliable enough for you, those are there as well!
I looked there. But it's the site claiming a trade mark of Delta Emerald exist. Or maybe it's there, I am using a phone so that could be why I don't see it.