Weird Text Block Issue

I seem to be experiencing something weird with the text block. I am creating an UnOrdered List. However after I leave the text block an go back in, it is creating extra code that shouldn’t be there. Is there a way to fix this?

Ex:

I put the code in like this:

<strong>Helm</strong>
<ul>
<li>Fusion Stereo System w/ Built In Amp & 6 Speakers</li>
<li>Powder Coated Patented T-Top Hardtop w/ Glass Enclosure, Electric Center Top Vent</li>
<li>Switch Panel w/ Lighted Switches</li>
<li>Console Glove Box w/ 12V Plug</li>
<li>Compass</li>
<li>Courtesy & Navigation Lights</li>
<li>Molded-In Fwd & Aft Spreader Lights</li>
<li>Remote Lights</li>
<li>Garmin 8212 Display</li>
</ul>

Then it shows up like this if I go to edit it later:

<strong>Helm</strong>
<ul>
<ul>
	<li>Fusion Stereo System w/ Built In Amp & 6 Speakers</li>
</ul>
</ul>
<ul>
<ul>
	<li>Powder Coated Patented T-Top Hardtop w/ Glass Enclosure, Electric Center Top Vent</li>
</ul>
</ul>
<ul>
<ul>
	<li>Switch Panel w/ Lighted Switches</li>
</ul>
</ul>
<ul>
<ul>
	<li>Console Glove Box w/ 12V Plug</li>
</ul>
</ul>
<ul>
<ul>
	<li>Compass</li>
</ul>
</ul>
<ul>
<ul>
	<li>Courtesy & Navigation Lights</li>
</ul>
</ul>
<ul>
<ul>
	<li>Molded-In Fwd & Aft Spreader Lights</li>
</ul>
</ul>
<ul>
<ul>
	<li>Remote Lights</li>
</ul>
</ul>
<ul>
<ul>
	<li>Garmin 8212 Display</li>
</ul>
</ul>