Really weird text messaging bug, need serious help.

[DicedOnions]

Whenever I send a text message ".got" gets added to the end of it. The ".got" only appears on the recipient and does not show on my phone's messages. This problem started with my Sony Ericson xperia and still continues with my samsung galaxy S3! The SIM card is different on both of these phones however my phone number is still the same. I have no idea how to stop this and has been very annoying for the past year If anyone can help me I would be very grateful.

 

[Rukbat]

Every recipient or just one recipient? Same network or new network? Same SMS (texting) app or different SMS app?