I feel like I must be missing something really, really basic here, but I've been trying to work with the newish Query Parameters, and no matter what I do the parameter always uses the "Current Value" rather than the value of the query I've tied it to. I have my parameter set to:

Required: Check
Type: Text
Suggested Values: Query
Query: UCN Query
Current Value: 99 9903104 (since it won't let me leave it blank)

UCN Query is below. No matter what I change that field in my table to, the UCN Query will show the correct result but the UCN Parameter itself will just use the current value. Any ideas what I'm doing wrong?
let
Source = #"Parameter Table",
#"Filtered Rows" = Table.SelectRows(Source, each ([Parameters] = "UCN")),
Values = #"Filtered Rows"{0}[Values],
#"Converted to List" = {Values}
in
#"Converted to List"