WormMine

When I use WormMine to extract a list of genes with a particular expression pattern, I can see how many unique genes are on the list in the display,
but when I download that list of genes, it is much shorter. Why? For example, using the ‘reproductive tissue’ template, Wormmine tells me
that there are 1931 genes with this pattern, but when I download the list of genes, there are only 1885. What’s up?