3Ds Max Help

[Neronian]

I've been working on some model I had drawn up as a sketch a while back, and my initial idea to get the rough shape of it was to draw out the shape from a top view and a left view (Using Curves), extrude those out, and then cut out everything that went further out (Like a Cookie Cutter) This would cap the sides and allow me to work on it further. However, When I went to do that... It didn't work out so well. First things I tried were Boolean and ProBoolean, after a bit of testing I realized that would not be working any time soon. I resorted to MANUALLY adjusting every vertex, using the other view as a guide, then repeating again on the second part. I ended up with a satisfactory result. But when I went to render it... Major issues... Any possible ideas on why this is would be appreciated.

Here's the shot of it in the Viewport.
Example 1

But in the Render the top part's seem to have disappeared!
Example 2

Edit: Also, When rendered from another angle (The other side) It glitches even more.
Example 3

Any help is Appreciated ^^

~Nero

---

"The pen is mightier than the sword." -Edward Bulwer-Lytton.
"Whoever said the pen is mightier than the sword never encountered automatic weapons." -General Douglas MacArthur