current version of EL doesn't consider nested brackets ... but brackets {} have highest priority so it's best to put everything you don't want to appear in evillyrics in such brackets
Thank you for replying Marek!
I used curly braces ( {} ) like you said, and it worked perfectly!

Now my formatting string looks like this:
[%artist% - ]$if(%title%,[{%album%[ #[%disc%/]$num(%tracknumber%,2)]} ]%title%,%_filename_ext%) '['%_foobar2000_version%']'
This puts the entire album name into curly braces. Problem solved!!!
Thanks again
