Hi @Jefcoat_Nathan,
What version of Connect and the field app are you using? From your screenshots it looks as if everything is configured correctly, however there must be something else causing the issue. On thing I noticed is some of the values in the choice list column have no spaces after the comma. This shouldn't make a difference but good to be consistent either way. I can see you are using a reserved keyword "date" in the name column of the survey sheet. This may cause unexpected issues, refer to latest advanced template and "Reserved" tab for full list of reserved keywords.
Can you share your XLSForm (xlsx file and media folder files) so we can take a closer look?
You can also take a look at the sample "Choice Filters and Cascading Selects" available in Connect, this has a working example of using regex() in the choice filter column.
I just tested it out with the latest 3.12 version of Connect and field app and it works as expected:
Regards,
Phil.