Hopefully my longer reply helps you, but it matters because you are "matching" positions sold and repurchased within the was sale window. So it's 10 for 10, etc. You could have 10 bought to match and 90 more with no match or 100 sold but only 10 of them rebought, in which case only those 10 would have the loss deferred using the wash sale rules while the 90 would have the loss.
As always, if this still doesn't make sense, a face to face conversation with someone who knows is probably worth having.
