If you record with regular mastering software it will always become read only. You can’t change an individual entry with mastering software but can only erase the entire CD and start over.
With packet writing to RW you can change individual entries and it shouldn’t record as read only. Some packet writing software might have a setting to make things read only but I’m not aware of it – don’t use packet writing. To packet write you have to format the RW and you can drag/paste in Windows Explorer.