Break vs. Paragraph

I have a problem that I'm not sure how to fix and any advice would be appreciated. In the fck editor when one types in the normal content area and hits return/enter to move to the next line, instead of providing one

<br>

it is using the

<p>

. However, when I use the Paste as Text button and type into the little popup window if I use the return/enter key it inserts the proper

<br>

instead of the paragraph code.

Other important info: This is happening to me when using the following input filters in Drupal and I have the break and paragraph code included in the allowed filters.

<a> <span> <br> <br/> <p> <div> <h1> <h2> <img> <img/> <center> <hr> <ul> <ol> <li> <dl> <dt> <dd> <table> <tr> <td> <em> <b> <u> <i> <strong> <font> <del> <ins> <sub> <sup> <quote> <blockquote> <pre> <address> <code> <cite><embed> <object> <strike>

Any assistance would be appreciated.