After Effects Export is at the wrong dimension

[Bonesjones]

Hello all, 

I am trying to export a mp4 file that is 21312(w) x 72(h) and each export has altered dimensions which come out at 4096x18 and those are very inccorect. Can anyone help me? 

here is a screen shot of my comp setting:

[Bonesjones]

Here are my export details:

[Byron Cortez]

Make sure you are showing the size at 100%, I think it is showing you the resolution the clip is open at. Set the clip to 100% and check if it shows you the corresponding size.