Since I'm not using Autofilter, I guess it doesn't matter.
I have found another issue. If I protect the spreadsheet, the filters
still work, but the remove filter button gives me a "Runtime Error
1004". It seems strange to me that I can filter, but not remove the
filter. I'm guessing it has to do with the method. I'm using a recorded
macro and using advanced filter to apply the filter.

Range("A1:G13").AdvancedFilter Action:=xlFilterInPlace,
CriteriaRange:= _
Range("K1:K2"), Unique:=False

For the "Show All" button, I'm using a macro with

Columns("a:a").AutoFilter Field:=1

Is there a way to remove the filter that will run on a protected
worksheet?