JS-R reported a bug in the sequence of results reported in the output tables, which I tracked down to my mdh_getTotals function, in which I had an ORDER BY clause sorting the results by count descending. That would put them out of order with the stored ethnicity groupings they represent, some of the time. Commenting it out seems to solve the problem without any side-effects.

Also incorporated several requested changes into the wizard explanation page, which is now ready to go, and made tweaks to the display of ethnicity groupings (space after colon) and output tables (explicit background colours to prevent the content div border from showing through, when the tables are too big for the content div and spill across the border).