Oh, and what about {to ... toi} ? They are also not copied, right? Or they are copied but {to'i ... toi} is not copied?
I definitely think that to...toi should *not* be copied. There's no point in restating the contents of the parenthetical remark.
e.g. A: .i lo mi mamta (to ri carmi co jai fanza mi caze'aca vau ta'o toi) cu jdice lo du'u vo'a mi dunda be lo rupnu be li reno jdini
B: ua .i go'i ra'o zo'e ne ku'i li cimu
"A: My mother (she's really been annoying me these days) decided to give me twenty dollars.
B: Ah, mine too (give me money, that is), but thirty-five dollars."
In this case, the to...toi is conveniently not copied, because B doesn't want to state that B's mother has been annoying him/her these days. If B did want to state that, they they could easily add {to lo me mi moi cu simsa vau .oi}. If copying were default, then it would become necessary to explicitly negate the copied parenthetical remark.
.i mi'e la tsani mu'o