Make sure to do a colonic or colema on the day of the liver flush to avoid any backflushing reflex from the colon in response to ingestion of the oil mixture. The bile was regurgiated into your stomach after it was released by the gallbladder and liver to help expell stones. Passing liver flukes during the flush can also make you feel sick and throw up, especially if the colon isn't completely open and clean.
Yes, those lines correspond to the liver and spleen functions.
The liver is an emotional center as it is a physical one. As old toxins and stones become released, so will old emotions and memories related to the time when they were formed. Cleansing the liver can have a liberating effection on all levels of body, mind and spirit.