haha yep, this! I had all the same issues, Takes a while to adjust to your setup.
I had the same setup for years, last year my right studio monitor broke.... I couldn't bring myself to get a different set, bought the exact same pair cause I was too scared it would take me years to adjust to the new speakers.
OUCH! That's not good. I could hear the whole spectrum, other than the lowest notes (as my setup isn't touching 20Hz,though 25Hz rumble could be felt). The 20Khz is kinda hard to pitch, just make me feel nauseous, but everything under it has some clear tonal quality. At least I know I've been looking after my ears properly!