single message sent is delivered indefinitely while roaming

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http://androidforums.com – My handset is motorola Atrix and the android version is 2.3.6. i am observing a strange behavior with the SMSs i send while i am on roaming. when i send an sms to a number while i am roaming in the recipient's network circle, my handset shows that the message is delivered once. but the recipient receives that message indefinitely as long as i am in roaming. delivery of this message stops only when i come to my home network location out of roaming. i am charged at roaming charges for all the sms as if i sent all those messages. i took this issue up with the network provider but they claim it (General)