Walaykumsalaam waa rahmatullahi,
It is okay, sister. You were trying to help someone sincerely and didn't know that it was run by a corrupt ideology. Also brother Danyal was already aware of them, so Alhamdulilllah for that.
As for how I came to know about 'taleef'. On any Islamic website of an organisation, I always look at 'About us' section before taking any knowledge from it. If there are names of known deviants, then I don't waste my time on that website. If these people are unknown, I google their names and see where they are educated and kind of views they hold and teachings they preach. It is not that hard to identify 'soofee' ideology usually.