There is an error in the complete example (section 4.3.3), step 5.
After applying "windows 30 words" to the result of step 4 only 5 of the 20 Matches
should be filtered out. So, there are 7 Matches missing: combinations 8/24/28, 8/5/28, 8/25/28, 8/35/38, 24/5/28, 24/25/2, 5/25/28. All of these satisfy the window constraint as well.
To make the example more readable, however, I'd propose to modify the window constraint to be more limiting. For instance with a window size of 11 only 3 Matches are left: 8/5/2, 24/25/28, 25/35/28.