lol yeah it seemed to happen that way, luckily it only took me about 10 minutes to switch it to the correct wayYou've experienced the wonder of Youtube cannabis growers, where the videos literally have you doing things in ways that are exact opposite of how they should be done.
In your case, it sounds like the "master grower" of the day had you install your exhaust fan backwards, sending in dirty air from outside of your tent through the filter backwards, filling the tent with air instead of removing it.
That's a new one, but it doesn't surprise me in the least.