Problem with music audio

[Marcão]

Hi people, how are you? I hope good. I am mastering one song and when checking volume with RoundTripAAC it shows the correct value (I putted 3 instances of the 4-Band EQ in the channel and 2 plug-ins: J37 and Izotope Ozone 5 in the master channel). Well, RoundtripAAC is inserted in the master channel too. After I render, it shows 3 dB above.

I putted -2.7 of ceiling in Ozone 5 and RoundTripAAC should show -2,7, but it shows -5,7. What's the problem? The rendered file also sounds very quiet.

Cheers.