I clicked on the heading 'Reviews By Author' and entered 'zalezac' in the 'Contains' field. No matching reviews found.
By trial and error, I found I had to check the 'Name' box too. That produced three pages of reviews.
At the bottom of page 1, I clicked to go to page 2. The 'Name' box became unchecked, 'Contains' was truncated to 'zal' and six reviews of stories by 'zaliterr' were displayed.
That wasn't what I expected.
AJ