Why is git subtree missing commits?

Question

I just ran git subtree split on my master branch but the subtree(dist branch) is missing the last two commits that are on the master b

Answer 1

I forgot the run the gulp build process. Because of this the new commit did not affect the /dist directory.

It makes sense that the commit wouldn't be passed on with a directory that was not affected by it. But not knowing this behavior ahead of time really confused the situation for me.