There's the problem of false positives or mistaken identity, and then there's the problem of erroneous listing. You're hearing that it's difficult to know if you're even on the list. Figuring out whether your name sounds like someone else's, whether you have the same name as someone else who should properly be named a threat, or whether your name is just there because of some false information or a false association is virtually impossible to know without digging deeper.
Certainly, at a theoretical level, those two are different—the case of mistaken identity and the case of being wrongly named—but the result is the same.