Found a bug with zo_strformat on the PTS to where it doesn't seem to be treated comma delimited numbers properly.
Code:
/d zo_strformat("<<1[0/1/$d]>>", "1337")
That will return "1337" as it should.
Code:
/d zo_strformat("<<1[0/1/$d]>>", "1,337")
That will return "1" however.