Specific User Presets Not Showing Up

I've been trying to figure this one out for hours: I have specific user presets not showing up in Lightroom CC.

Lightroom CC version: 1.4 [ 20180608-0705-e1ba7c8 ] (Jun  9 2018)

Operating system: Mac OS 10

OS Version: 10.13 [5]

Here's what it's my User Presets folder (Library > Application Support > Adobe > Camera Raw > Settings > User Presets):

Here's what's showing under "User Presets" in Lightroom. Notice none of the presets starting with "LF" are being displayed:

Whenever I try to import the "LF" presets, Lightroom acts like it successfully imported the presets but does not show them in the application.

Any ideas? Any help would be greatly appreciated!