My table weird after merge, i need someone explanation and opinion ! [For expert only]

Question

Look, i create table with 3 rows n 2 cols. Then i try to merge cell bbb and eee, and the result not what i expeted. It should be cell bbbeee will had half height of cell ccc, and cell ccc had height of cell bbbeee.

This is the code :

<br /> before merge cell bbb and eee
<table border=2>
<tr>
<td>aaa</td>
<td>bbb</td>
</tr>
<tr>
<td rowspan=2>ccc</td>
<td>eee</td>
</tr>
<tr>
<td>ddd</td>
</tr>
</table>
<br />after merge cell bbb and eee
<table border=2>
<tr>
<td>aaa</td>
<td rowspan=2>bbee</td>
</tr>
<tr>
<td rowspan=2>ccc</td>
</tr>
<tr>
<td>ddd</td>
</tr>
</table>

Answer 1

<table border=2>
<tr>
<td>aaa</td>

<!-- a few change here :) -->
<td rowspan=2>bbb<br/>eee</td>
</tr>
<tr>
<td>ccc</td>
<!-- I removed td tag -->
</tr>
<tr>

<!-- I added colspan and align for ddd -->
<td colspan=2 align=center>ddd</td>
</tr>
</table>