Not receiving sent sms

Hello, when I send the command “get 10 sent sms” (or any specified number) I do not receive all sent sms within that range. I am only receiving a few recently sent, and then some sent a year ago long deleted. Also I do not believe I am receiving all sms from inbox or with the cc sms command. Is there any help for this?

Are the SMS saved on SD card? Are they attached to the device or SIM card?

please contact me at holzner at avast.com for further investigation.