http://i.imgur.com/Q0CW8X8.png
All of the physics of the union work fine, except for the bases, which have some sort of invisible ramp near the ends of them. Im not sure whats causing this and it's very frustrating, so could someone tell me what's causing it and how I would go about fixing it?
First of all, this is not a scripting question but I will offer some assistance.
Yes, ROBLOX Union's physics are obviously not spot-on. There is someone you're suppose to send Unions to if they do not appear to function as they should, sadly I've forgotten the person's name, so if anyone knows, comment it please.
Anyway, the problem is just that ROBLOX Union's are a bit buggy. You can re-union it differently and try to see if the problems is fixed. You could Separate unions until it's fixed.
Also, please try to keep questions for this site Scripting! You should have asked this in the Forums of ROBLOX!