Texts random letters and then sends on it's own

When you are in your text screen, in the upper left hand corner there should be a little icon that indicates what "mode" of texing. Typically, it will be Abc1 with an arrow pointing up, This means that the first letter that you type will the CAPS and the rest will be lower case. If you hit your pound # key it will change what mode you are in. It sounds like you may be in predictive text mode and you don't know how to use it. If your icon is Abc with a book and an arrow you then you are in this mode. How to use this feature is easy. You just hit the key with the corresponding letter once and then hit the next key until the screen "predicts" what you are trying to type. If you are typing the word "phone" you would just hit 74663 and it should predict that you are trying to type phone. It will give you more options that you can choose from by using your left or right Nav buttons then put it into the text by pushing the "up" button. If you are in the predictive text mode and are used to using the "regular" mode this may be the reason you are sending the message with out meaning too.
Good Luck!!! Let me know how it works for you.

Have you tried to change the TEXT T9 from iTap to just ENGLISH