100 percent - the agency leads the page. And not just one person, but several managers. They speak English at different levels. Therefore, sometimes it seems that you communicate with "different" Marias.That makes sense intuitively. I think many women on the site pride themselves on responding directly.
Having said that, I’ve been very suspicious of Maria in particular. For instance, sometimes her spelling is perfect and sometimes it looks like a non native speaker. So I suspect you’re correct, but I don’t know for sure.