LG V VX-9800

hello guys, i hope im not annoying anyone by asking a question that's already been asked but i couldn't find the thread containing my answer. everytime i load a new ringtone via usb through bitpim my rigntone tags shift. meaning i have to reassign all my individual ringtones all over again because loading the new ringtones shifts the order. can anyone help? i'd really appreciate it. thanks in advance everyone