Highlighting rules wont read past a period
When I have a file name that contains a period as in "Historic Events 1.1 Crisis in Leadership in 1968", highlighting rules don't recognize anything after "1.1". The text 1968 and anything else that comes after the period in 1.1 will not be responded to by the highlight rules.
You can say, name contains, and put in "1968", you wont get a highlighting rule to apply.
But if you change the name of the file to, "Historic Events of 1968 1.1 Crisis in Leadership", you will get the highlighting rule to apply.