Odd category rule behaviour

[hemi]

Noticed this interesting behaviour today. I'm trying to match the following category rule:

(ORDDIST_8,"get","statement","got","for","let")

Excuse the nonsense - it was stripped down to try and make sense of why the rule wouldn't return a match.

So the following text matches:

get statement for but got for let

But not this:

get statement for but got for let for

Is there any logical reason the additional "for" at the end of the sentence would stop the rule from returning a match?

Cheers