This is the tech I use, except I use xylene which works the same as the limonene, you will notice that the author says that the bark will absorb some of the solvent. This has been my experience too. Here is a direct quote from the tech that should answer your question underling the parts that seem pertinent to your problem:
"
Bark will slowly absorb a noticeable portion of the solvent, this is common.
Step 2: Mix so the solvent contacts all the bark-mush as thoroughly as possible, it should not mix into the bark and should remain transparent.
Mix it well several times over 10-20 minutes. That is all that is needed to dissolve the DMT-freebase in to the solvent. YOU DO NOT NEED TO STIR CONSTANTLY, ONLY PERIODICALLY"
I think part of your problem may have been that you kept the solvent in the bark mush too long.
Good luck! I hope this helps.
"So it was that Dreamer put a tree at the center of the universe and from that tree were born time, space, individuality, conflict, sex, and death. Of course it is no coincidence that these are the ingredients of a good yarn and the first one the tree spun is still one of the best: boy meets girl, boy loses girl, boy gets girl back. Since then, every time a seedling sprouts, dozens of new stories sprout with it, so Dreamer hasn't been bored for a moment." -from the book "Plant Spirit Medicine"