We pay our cleaning person $X for every visit. Often they cash 2-3 checks at once. When I download from Alliant into Quicken, I only see one transaction for $X, even though there are two or three in the register on the website.
This is only modestly annoying, because the downloaded information always has to be adjusted anyhow, since it doesn't have the check number or payee fields set right. I think I am no longer seeing the issue with duplicate transactions on my Alliant Visa card … it kind of makes me wonder if they fixed that problem by using an inappropriate set of identifiers to create a unique index.