Re: The crux of two ranks having any equality
Szczepan is pretty curt, as usual. But I agree with Katherine. He does have a point. If you distrust the training in your dojo, not much good will come out of it - regardless if the training is truly inferior to what you were used to, or if you just don't understand what they are doing and why.
Not having told your dojo environment about your previous rank also makes things kind of complicated, I think. It must be next to impossible to speak up your opinions now.
In my mind, if you don't respect the rank in that dojo, you should not accept the shodan they are willing to give you. And you should probably search for other training opportunities. Just what does it give to you, training there, all the time feeling that what they do is bad. A feeling of superiority?