Um? - I only posted this question once, are you confusing this with the other question I posted earlier today about influence of estimator in MI? I couldnt find an earlier post by anyone else on this exact topic.
Jonathon - the difference in the scale should not be a problem at all. As you say there is no assumption of time invariance in the imputation model. The variables are treated as 9 different variables that help impute 30 categorical variables.