is all your width and height percentages the same? I see that in one you have a width of "18%" and on another you have "20%", try make both the same to see if it gets your result you want.
Personally I prefer to hand code web pages, its more fun and you can see problems as they arise.
ik
Edit: your table width and heights are not consistent, I know this does not matter for a lot of people, but this will let you have the same results all over.
e.g.
<table>
<tr>
<td width="10%" height="5%">something here</td>
<td> width="15%" height = 17%">something else here</td>
</tr>
</table>
amend the width and heights to be the sameas what you want.
<table>
<tr>
<td width="10%" height="5%">something here</td>
<td> width="10%" height = "5%">something else here</td>
</tr>
</table>