You must create an action to use this string on a tag field.
See /t/967/1
Action type: Format value
Field: TITLE
Format string: $num(%track%,2) - %title%
Are all your titles "Genesis 1" ? (Too bad you cut the screenshot there)
The reverse might be even better:
%title% - $num(%track%,2)
so you get Genesis 1 - 01, Genesis 1 - 02, ...
Use the tracknumber wizard [Ctrl+k] first if you don't have proper track numbers.