Help explain use of DL web page

Please help solve this confusion, help explain in the DL web page, there's a type of mach. architectur download UI that : The DL link is <Base this arch. name>-Current but The hash DL link is <Base this arch. name>-Snapshot so naturally, it'll most likely fail in matching test The DL type: amd64/x86_64 Please help my hard attempted .iso file download to get useful not in vain !