Your high pass filter is usually used to protect your smaller speakers from playing too low. If they play too low, they can reach their mechanical limits, causing them to fail eventually.
That being said, if you like the sound of your setup, and you don't think you're damaging your speakers, play it however you feel sounds best. Play with it a little, you might find a sweet spot you like even better.
Normally, not always, but normally, the subwoofers will play up to 80 hz, then your mids will play from 80 hz to say 3000-4000 hz, then your tweeters would take over for the rest. But like I said, if you like your door speakers to play below 80 hz, overlapping what your subs are playing, it really only matters to you bud. If you like it, slap it