Mac OS Vim Formatting Issue

I. 33: Introductions

A. 33: Meyer: Scientific and Philosophical Introduction: Defining Theistic Evolution
1. 34: Evolution #1: "Change over Time"
a. 34: Can be simply "change over time". Has little or nothing to do with the modern "neo-Darwinian" theory of evolution.
b. 34: In evolutionary biology, "change over time" can refer to the idea that the life forms we see today are different from the life forms that existed in the distant
past.
c. 35: "Change over time" can also refer to observed minor changes in features of individual species - small-scale changes that take place over a relatively short
period of time: microevolution.
Testing.

I'm having significant trouble with the way my Mac OS is displaying a particular file compared to gVim on Windows or Linux. This appears to be a problem with the built-in vim, although I've found that even brew install vim gives me a vim that behaves exactly the same way. Certainly MacVim is displaying it the same wrong way. I've attached the file that's behaving differently: test.txt. I've also uploaded the screenshots showing how the indenting looks completely different. Note: on the Mac, I can't even navigate to the true beginning of the line (directly under the initial 'I.' in the very beginning of the file) on every line. I've tried the troubleshooting page here:

https://github.com/macvim-dev/macvim/wiki/Troubleshooting

with no joy. Any ideas? Thanks for your time!

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