Should my original unchanged 1040 be included with my amended 1040-X?

When I printed my 2021 1040-X amended return for mailing, it included my original, unchanged, 1040-SR with the old (incorrect) values. Is that correct? Should my original return be included?

Does TT just print everything with the 1040-X and make me select the changed pages to actually be mailed??

 

I'm using Turbotax 2021 Home & Biz download version on Windows.