I had a quick look at the Position Register and put this in

WDATA = %0001001000001111 '%0001 011111 001111
GOSUB Send ' Position ADDRESS 15

It moved the lines up and I could get line 9 showing - still missing line 10 at the moment.

Looks like Row Attributes may also be involved.

Will have to ask my friend who did the assembler version if he did anything to Row Attributes.