I have checked details of JTEPA and I think we can use it for customs clearance.
Refer to your question about QTY , column no. 6 of JTEPA shown “1 set” as same as QTY on invoice and column no. 4 of JTEPA shown total 4 packages as same B/L and packing list.
Then, I think no need to request to revise JTEPA but I will let Jib san(shipping) re-check to the customs formality again for confirmation.