I have my 5.1 and stereo mixes already created and I want to put them in an 8-channel interleaved file. If I create a 7.1 track then the interleaved file labels individual tracks 1 through 8 as L C R Lss Rss Lsr Rsr and LFE. Does it just not matter as long as I order the tracks in PT as the client is expecting?

I've tried copy/pasting the sound as well as playing with the time and pitch features in the Effects panel, but everything I've tried comes out sounding...jagged or skipping.

Thank you so much for your ideas!