Well, part of your problem is that you are consuming items not allowed on the diet such as rye and quinoa so its partially your diet that is the problem. You are looking at a bad candida diet if you think these items are safe.
I also would not associate gas with IBS but would associate it with potential deficiencies in stomach acid:
You likely lack stomach acid to help break down the foods you eat which is typical with people who have candida infestations.
I wouldn’t worry about IBS right now…what other symptoms make you think you have it?