[code] tag issue

When I would post a message using the [ code ] tag, I get additional numbers.
For example.
I type (without the spaces inside the brackets) [ code ][ img ]http://www.websitename.net/sigs/Name.png[ /img ][ /code ]
It appears in the code block as:

How do I get it to NOT show :5589512026 ?
For example.
I type (without the spaces inside the brackets) [ code ][ img ]http://www.websitename.net/sigs/Name.png[ /img ][ /code ]
It appears in the code block as:

How do I get it to NOT show :5589512026 ?