It could actually be a good sign, that of metabolic normality returning.
As you have reduced the spikes in glucose the poor hysterical pancreas is no longer frantically hurling out all the insulin it can, whilst being ignored, as insulin levels go down cell membranes become more permeable and stored carbohydrates begin to flow out. Whilst a type 1 uses a basal insulin to reduce blood glucose long term, the exact reverse is happening in type 2 management - at least that is how I visualised it happening.
In a little while you might get false hypos as your sensitivity to your own insulin increases - that is also a good thing.
Brazil and almond nuts should not disrupt glucose control - for me it is all about the carbs.