I'll take a wild stab at this. Some 20+ years ago when I attended meetings of the local audio club, our club system used a pair of Acoustat 8 electrostatic speakers. The room where we met had an angled ceiling (like the front-to-back half of a room with cathedral ceiling), and it had a strange acoustic characteristic: with some recordings it created reflection/reverb that made music/voice sound like it was coming from above and behind you. By changing your seating position you could reduce this effect. So, I'm thinking that your Maggies, being a dipolar speaker like the Acoustats, generate a rear sound wave can cause strange propogation problems. You might try some room treatment (like Sonex panels) at key reflective points around your room, combined with changes in the amount of forward or backward lean of your speakers. If these approaches don't help, contact a local high-end audio dealer for the name(s) of companies that do acoustic room analysis and tuning. Hope this helps.