-- In your case, you did not change status, hence there is no effective date as you assumed. Your H-1 status started from effective date of your expired H1 (if that's your first H1).
2)目前家屬還在國內,我是否可以同時提交I-485? 如果不,在"Applying with you"應選Yes or No?
-- 不可以, [No]