Bloody show is often accompanied by the mucus plug because subtle cervical changes and dialation cause both. When the cervix changes it releases the mucus and tiny blood vessels break. Some peoples' plugs detach whole, some detach partly and come out in streaks, some are released just a bit at a time and aren't recognized in a "hey, that's my plug!" way. Some peoples' bloodvessels (I'm having a bad spelling day) are stronger than others' and depending on the type of cervical change occuring some people are going to bleed a bit more than others. There's just a big set of variation for these two things.
So the answer is that they don't always come in any particular way, but they do often come together just because the same thing brings both.
I would suspect that your initial bleeding from Wed. might be prolonged because you also have a bit of change happening too. But it's hard to say, YK?
ETA--because they are so commonly together I do honestly think of them as interchangable terms, even though I guess techniquely(sp, again) they probably shouldn't be.
and planning to eat it again