what is a Buffer over ride... and why when i have put in my data, then it told me the "buffer over ride" error. then it wiped everything...twice... after finding out how to reset it online..done. great popped in data again. saved everything and now i find i have saves and backed up everything three times. has thrown out my GST as in 3x the amount to pay??? how can i take off stuff i have saved. am running cashbook.