It really is Eschers III & IV. EIII has the strummy beginning into the power lead. EV starts right off with the slide-like opening lead.
So, you split off Sylvia, split up Eschers, and combined the 2 Tunage tracks... Right?
Did you just toss that 1:01 encore "Intro" track #10?
Depending on the flac frontend--or the LAME encoder--you have, it may not handle the 24 bit files.
Do you want me to take a crack at this, or do you have enough info to do it yourself? Sounds like you have the WAV files all tracked out in Audacity already. Just change your WAV Export settings...
Preferences, Uncompressed Export Format, "WAV (Microsoft 16 bit PCM)" On the Quality tab, set the High-quality dither to "Triangle."
You can also use "snap-to" and the "cdda" selection format to get it to break files on sector boundaries. Or clean them up afterward in Traders Little Helper.
HTH