I went through this. At about 5-6 weeks after surgery, I went in for a post-op check up and told my surgeon I was having pain when I ate and issues with ANY fats/dairy products. After doing a gallbladder scan, they found my gallbladder to be functioning properly though I read through everything I could online and it sounded like classic case gallbladder problems. After a few weeks the symptoms went away and I feel much, much better.
Hope you get some answers or relief soon.
Partial Fundo. November 2013