HTML table not rendering as expected - html

Question

I am trying to create a HTML email, and therefore using a lot of nested tables. However, My second <tr> is not inline with the first row, and I'm not quite sure why. Here is how it's coming out at the moment:
I want the second row to be centred rather than touching the edges.
Here's what I have:
<!-- BACKGROUND -->
<table cellpadding="0" cellspacing="0" border="0" width="100%" bgcolor="#000000">
<tbody>
<tr>
<td>
<!-- SECTION 1 -->
<!--START OF EMAIL BODY -->
<table cellpadding="0" cellspacing="0" border="0" width="600" align="center">
<tbody>
<tr>
<td>
<table cellpadding="0" cellspacing="0" border="0" width="600" bgcolor="#ffffff">
<tbody>
<tr>
<td height="30"><!-- PADDING --></td>
<tr>
<td style="font-family:Arial;font-size:12px;line-height:15px;color:#353535;text-align:center;">
Not rendering correctly? View this email as a web page here.
</td>
</tr>
<tr>
<td height="15"><!-- PADDING --></td>
</tr>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
<!--END OF EMAIL BODY -->
<!-- SECTION 1 END -->
</td>
</tr>
<tr>
<td>
<!-- SECTION 2 -->
<!-- LOGO AND SOCIAL MEDIA -->
<table cellpadding="0" cellspacing="0" border="0" width="600" bgcolor="#FFFFFF">
<tbody>
<tr>
<td><!-- <td height="60">-->
<table cellpadding="0" cellspacing="0" border="0">
<tbody>
<tr>
<td width="425"><!-- PADDING --></td>
<td style="font-family:Arial;font-size:10px;line-height:15px;color:#353535;text-align:center;font-weight:bold;">SHARE
</td>
<td width="10"><!-- PADDING (SPACE BETWEEN SHARE AND LINKS) --></td>
<!-- LINKEDIN-->
<td>
</td>
<!-- TWITTER -->
<td>
</td>
<!-- YOUTUBE -->
<td>
</td>
</tr>
</tbody>
</table>
<!-- SECTION 2 END -->
</td>
</tr>
</tbody>
</table>

Answer 1

There's nothing wrong with the alignment of the row.
What are misaligned are the two tables inside the rows.
Compare:
<!--START OF EMAIL BODY -->
<table cellpadding="0" cellspacing="0" border="0" width="600" align="center">
<!-- LOGO AND SOCIAL MEDIA -->
<table cellpadding="0" cellspacing="0" border="0" width="600" bgcolor="#FFFFFF">
One of them is centred. The other is left aligned.