[MiCo1]

I've created a template for a long document with customised headings
throughout that show the outline level the format 1.0, 1.1, etc for headings
and 1.1.1 for sub-headings, and the first letters of the heading &
sub-heading text alligned even trhough to double-digit sub-headings.
eg "1.0 [tab] Heading 1 Text"
"1.1.10 [tab] Sub-heading Text"

When creating a Table Of Contents however the sub-headings with
double-digits always automatically alligned 1 space further to the right
eg "1.0 [tab] Heading 1 Text"
"1.1.10 [tab] Sub-heading Text"

How can I ensure all of the text will all allign correctly when creating a
TOC?