every time after mixing down and getting a mixdown track, i will start to do some pre mastering on it or perhaps just raise the overall levels. However, i realised that when i do mastering on the track, my mix will be thrown off again. Especially if i boost volume through compressing or limiting, or multi band, the instruments and vocals will each be boosted at different amounts and thus my mix will be off with the vocals too soft etc. I will have to go back to the mixing session file and re-edit the volume and import the edited mixdown into the mastering session again. Im using Izotope for the mastering. How do i curb this problem of backtracking? The mixdown always seems fine volume wise but the balance gets thrown off in mastering.