A table row was 4 columns wide and exceeded the column count established using column

Не могу понять, чего хочет Валидатор

A table row was 4 columns wide and exceeded the column count established using column markup

Это css

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table {

width: 80%;

font-family: "Lucida Sans Unicode", "Lucida Grande", Sans-Serif;

font-size: 14px;

border-radius: 10px;

border-spacing: 0;

text-align: center;

margin: 0 auto;

}

th {

background: #336cbf;

color: white;

padding: 10px 6px;

}

th, td {

border-style: solid;

border-width: 0 1px 1px 0;

border-color: white;

}

th:first-child, td:first-child {

text-align: center;

}

th:first-child {

border-top-left-radius: 10px;

}

th:last-child {

border-top-right-radius: 10px;

border-right: none;

}

td {

padding: 10px 6px;

background: #edba69;

}

tr:last-child td:first-child {

border-radius: 0 0 0 10px;

}

tr:last-child td:last-child {

border-radius: 0 0 10px 0;

}

tr td:last-child {

border-right: none;

}

table:hover{

-webkit-transform: scale(1.5);

-moz-transform: scale(1.5);

}

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Это HTML

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<table class="table_col">

<colgroup>

<col style="background:#C7DAF0;">

</colgroup>

<tr>

<th>Тариф</th>

<th>Письмо</th>

<th>Посылка до 1 кг</th>

<th>+ 1 кг</th>

</tr>

<tr>

<td>По Москве</td>

<td>340 Р</td>

<td>380 Р</td>

<td>+40 Р</td>

</tr>

<tr>

<td>Около МКАД</td>

<td>480 Р</td>

<td>530 Р</td>

<td>+50 Р</td>

</tr>

<tr>

<td>Область 15 КМ</td>

<td>650 Р</td>

<td>700 Р</td>

<td>+50 Р</td>

</tr>

<tr>

<td>Область 50/100 КМ</td>

<td>1200/1600</td>

<td>1280/1680</td>

<td>+80 Р</td>

</tr>

<tr>

<td>Область 150/200 КМ</td>

<td>2000/2400</td>

<td>2080/2480</td>

<td>+80 Р</td>

</tr>

</table>

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В общем, такая картина маслом