Are you asking why it is happening or are you asking how to implement it?
If the first, double check if there are hidden buttons / fields by the radio button, a script trigger, or auto-entry.
If the later, this can be done with a fwe different methods.
What version are you using?
How to implement is my question.
I am using version 10.
I have a field on a layout pointing to a value list that has the choices yes/no. When the user selects yes i want a value of 1 returned to the db, otherwise 0.
thank you for your response...I have worked it out.