I have a dropdown list as parameter in md

This dropdown uses a value list

There should be a way to specify the ordering of this values (like asc/desc) 
right now they are ordered the way they where loaded into QS.
But if the table in QS is a concatenation of two other tables, then the ordering is off.

Example:
table1: 10, 20, 30

table2: 15, 25, 35

in QS: value table := load table1 concatenate load table2 (not real code)

result in value list in md: 10,20,30,15,25,35

there should be a way to order the list in md.