Garmet / Cloth make it double sided?

[20023546]

Hey I'm following a dude's step on making his simulation, but noticed his bend / wave / mesh actually are both sided.

So when i press simulation my black sided faces are going the opposite direction to the gravity. Did I bend the garmet the wrong way? Is there a way to flip all the sides. I don't see him do anything even at 0.25 speed on youtube.

https://www.youtube.com/watch?v=LB4iBow1Y1Q (14:26) he presses simulate and it falls down all fine.

This is what happens when I press simulate.

Before

After

 

My only guess is that his is double sided? Thanks for the help

[RobH2]

It looks like you have some internal pressure or something. However, it's not a closed manifold shape so I'm not sure pressure would even work on it.  The bottom part of yours stays on the yellow object, but the radius expands upwards. Odd...  I don't think it has to do with two-sided. It's something else. 

Can you upload your file? I'll be happy to look at it and see what I can find.