What values are you getting when you insert the info in the db or print it out on the page? The key to using these types of inputs is that they have same name but different id's and values. It looks like yours are setup like this but it seems that they are passing as an array.
If you are getting the array instead of the values in the array you will need to explode the array to store the info in your db. You could try removing the  after the name of the checkbox to see if that gets you just the value portion of the checkbox in your db and in the email.
You might get a better result if you use a radio group or have just a single checkbox for yes rather than one for yes and no.