Swype delete key problem

I have a Samsung Galaxy S2 with the latest firmware an a preinstalled Swype on it. The problem I have, is in the standard email application when using swype keyboard and trying to delete a character, it will append the word again and so it's impossible to delete a word. For example: I type Test, then hit the backspace button and it results in TesTest. My question is now, can I solve this problem without having to root the phone in order to reinstall swype? ---------- Addition: My android version is 2.3.5, my firware version I9100BOKJ1.