Apex Clothing cause issues to normals!

Hi,
I am using 3ds Max 2017 and unreal 4.12.5 and was wondering if anyone has ran through this problem with the

I trying to create 2 sets of tent which has clothing physics on it. I looking into using apex, I’ve been through loads of videos. I have followed about 5-8 videos tutorial, but they all have a final good out come. I have messed about with the clothing settings and how painting settings but it always turned out the same.
With mine the faces going crazy and drop to the floor. I have search on the internet for answers but haven’t found any. Now the models aren’t really poly and aren’t too low either.
I have added the image of the tents with wire-frame and how it goes when the apex is applied in unreal.
Any help or suggestions would be great!
Thank you-