Issues adding a track number to beginning of a filename

Support
#1

%track% should return the track number but is returning the "Position in set" too.

Set the "Tag - Filename" as:

%track%. %title%

If I have a 28th track of 30 total, It returns:

2830. etcetc.mp3

Instead of:
28. etcetc.mp3

#2

Instead of

use
$num(%track%,2). %title%

#3

Thanks