Shouldn't be. The ones packaged by BodyShop and installed by the Sims2Pack installer are normally of the form hhhhhhhh_hhhhhhhh.package, and you thought you'd sent them to Sim-Siberia already.
The alphabet soup files are things that hid inside packaged houses.
I'm thinking the creator renamed the package file before packing it up, so they're named something like "Joe's SimSelf.package"
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