Yeah this post is old, not sure how many will notice it..... but here is my two cents.
I am working on a roundworm infection. I have many regular enemas, some ACV, some with herbs, but only done a few coffee enemas. The first two CE's that I did resulted in expulsion of some worms, and alot of filmy stuff. I don't think they are a substitute for liver flush, but since they do stimulate the liver to release, they probably will purge what is hanging around the ducts. What you got rid of might have produced some blood if it was firmly attached to the intestine wall. My opinion is that it's a good start, keep it up, either with coffee or other type enemas, and do a parasite cleanse. I think when you first start getting things stirred up is when you should hit whatever you might have with strong herbals, garlic, or whatever you choose.
As for the seeds, when I first started cleansing, I got out seeds that were off white and oval, but they had a line down the middle lengthwise just like barley. Haven't seen them for over a year and a half, but I don't do enemas like I should anymore either, I just did my first in months the other day, and got alot of filmy stuff out. This post makes me think I might do a Coffee-Enema