Adding Cupla affects entire plan

[Kbird]

just had a play with the tutorial instructions ,and since I didn't read it properly the 1st time , I built the 2nd floor DERIVED from the 1st so the Tut. didn't work,
it did when I use the option "create a new blank 2 floor plan for new floor" per the Tutorial. David missed this step in his instr. too but he probably did it without thinking knowing he didn't want any exterior walls on the 2nd floor except the cupola....

M.