Asian characters one layout cell or many? 19.299

style:layout-grid-mode has the property "both" which is defined as follows:

both: Like lines, except that the lines are divided into rectangular cells. The calculation of the cells depends on the style:layout-grid-standard-mode property. Within a layout cell, nor more than one Asian [UNICODE] character is displayed. Asian characters that do not fit into a single cell are displayed centered into as many cells as required. Non Asian text is centered within as many cells as required.

Obviously the "nor" becomes "no" but then the question is: If only one Asian [UNICODE] character is displayed in a layout cell, why say: "Asian characters that do not fit into a single cell are displayed centered into as many cells as required."

There is some shift in the usage of "character" between those two sentences but I can't puzzle out how to reconcile them.