Limiter in multitrack mix

Hi, I'm not an expert in STP and know I'm not doing this right, hope if I explain what I am doing and trying to achieve someone can help!

I have a multi track project exported from FCP with voice over, music bed and other SFX. I have everything going to one submix, to which I have applied a limiter. The limiter has output level of -9 as that's the limit for TV here. I have pushed up the limiter gain, pushed up the volume of the VO track, and pushed down the volume of music and SFX tracks.

This generally makes the VO stand out and sound clear and the other tracks to recede (A kind of ducking effect I guess) The problem is that it causes kind of echo/reverb in the music track. Increasing the limiter release reduces this a bit, but then the VO isn't as loud / clear.

Is there a better way to do it? If the limiter is applied to only the VO track, or other individual tracks, I'm not sure how keep the whole thing under -9, and get the "ducking" effect I am after. Hope that's clear, thanks.