I have the same behaviour with CUPS. There is no trouble with this.
HPLIP is not responsible of this behaviour. A quick search leads me to files /usr/lib/cups/backend/epson and /usr/lib/cups/backend/canon which belong to cupsys-driver-gutenprint package containing CUPS drivers. I don't think this is abnormal if you have a parallel port.
I have the same behaviour with CUPS. There is no trouble with this. cups/backend/ epson and /usr/lib/ cups/backend/ canon which belong to cupsys- driver- gutenprint package containing CUPS drivers. I don't think this is abnormal if you have a parallel port.
HPLIP is not responsible of this behaviour. A quick search leads me to files /usr/lib/