Media Encoder changes the dimensions of my video

Its' been a looooong time since I've used Flash (now Animate) and I'm having some trouble figuring out how to encode my videos properly without it changing the dimensions of my videos. I've burned about 4 hours trying to figure this out myself... so here I am.

Here's what I've done:

1. I created two set of short animations in Animate (5 second videos) that are two different sizes (1200x675 and 1440x1080) which I will need in two different formats (mov and mp4).

2. Export > Video (all are approx 475mb files before I encode them)

3. Then I dragged those .mov files into the Media Encoder queue

4. Change format to Quicktime or h.264 (I need some in each format)

5. Edit the preset

     • uncheck "Export Audio"

     • Basic video settings » select Match Source

6. Press play....

Here's the problem:

1. The videos that I encode as .mov are still 100mb — I believe these come out the correct dimensions.

2. And the videos I export as .mp4 come out around 7mb (this is great), but it vertically squishes them.

How do I get them both to export smallest file size and the same dimensions they are before I encode them?

I attached screencaps of my setting for both...

Thanks in advance!