@ brad
a remix is exactly that. a re-mix
there are no rules

a bootleg is just an unofficial remix, not sanctioned by the artist or label

this was held more true when bootlegs were pressed to white label. you knew it was unofficial and therefore a bootleg. these days with the internet and mp3s, theres no real way of knowing if a remix is official unless you go and look it up, or bought it from a legal source.
Even with "Promo" packs released on forums, the compiler could have just found some remixes on the web and decided to include them too