Warning count wrong

When checking http://www.timdalling.co.uk/blossom2.html I get no errors, 
but the heading says


      Validation Output: 4 Warnings

However, only three warning messages are listed. These are all the same, 
only the line number changes:
A table row was 3 columns wide and exceeded the column count established 
by the first row (2).

This is a valid warning and the only thing I am drawing your attention 
to is the mismatch between the heading and the actual number of warning 
messages.

Roger Cornwell