Rotating foods can be a result of candida/bad bacteria ability to adapt to what we eat. The less good flora we have to inhibit candida's ability to adapt the more we might have to consider rotating foods. A while back ago when I went on a 95% fat+meat diet (bee wilder plan) I experienced candida's ability to adapt. Month by month Candida become more and more effecient at utilizing fat+meat for energy. After 5 months I had so much gut inflammation that I had to dramatically change my diet. It got to a point where it felt like candida was just as effecient at burning oil and fats as it does sugars. Sometimes allergy can be confused with candida/bad bacteria interfering with proper digestion or producing harmful metabolites/enzymes that wreak havoc on our Gi tract. In addition, allergies or food intolerances become worst when we dont have the proper balance/amount of flora for optimal digestion.
Whats interesting is some studies showed that some of our friendly bacteria is responsible for converting bile acids into a less harmful form. So if were lacking that certain bacteria due to the interference of bad bacteria/candida than the bile might not be properly converted and could result in more GI inflammation. Some might intrepet it as an allergy.