请教 8 老师: 父母移民 I-864 问题

老师,

part 3 item 9 :

I am sponsoring the following family members immigrating at the same time or within six months of the principla immigrant named in Part 2 above. Do not include any relative listed on a seprate visa petition.

要不要 check this box ?

我为父母同时递交申请, 他们人在美国, 准备放在同一信封, 分开的package.  有点糊涂,若填,上面提到 do not include; 若填, 后面的 household person, 就多一个人

先谢了.