This really cannot be considered a bug of HPLIP, it is a problem of the printer setup tools. See the 4th comment in this bug report, from Pascal De Vuyst at 2006-02-28 21:46:06 CET:
You see the printer twice as it is once directly detected by CUPS through its "usb" backend and once via HPLIP via the "hp" CUPS backend. If you run "lpinfo -v" or use the CUPS web interface (http://localhost:631/admin/) you will also see two entries for your printer. In the CUPS web interface you can clearly distinguish the two entries, all printer setup tools should do so, as it can always happen that more than one CUPS backend can be suitable for one and the same printer. The printer setup tools should also recommend the "hp" backend over "usb" because it supports the special features of HP printers. gnome-cups-manager is not maintained any more and will be replaced by printerdrake. printerdrake suppresses the non-HPLIP entry. See also https://blueprints.launchpad.net/distros/ubuntu/+spec/printerdrake -- Duplicate printers listed when adding HP printer https://launchpad.net/bugs/32302 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
