Bootstrap grid columns overlapping each other

Question

I have an issue with Bootstrap's grid layout and the overlapping of columns within it. I'm not sure what the issue is really, any advice would be most appreciated, thanks.

<div class="container">    

    <div class="row">
        <div class="col-md-6">
            <img src="content/one.png">
        </div>

        <div class="col-md-6">
            <div class="row">
                <div class="col-md-6"><img src="content/two.png"></div>
                <div class="col-md-6"><img src="content/three.png"></div>
            </div>
            <div class="row">
                <div class="col-md-6"><img src="content/four.png"></div>
                <div class="col-md-6"><img src="content/five.png"></div>
            </div>
        </div>

        <div class="col-md-9">
            <div class="row">
                <div class="col-md-3"><img src="content/six.png"></div>
                <div class="col-md-9"><img src="content/seven.png"></div>
            </div>
            <div class="row">
                <div class="col-md-6"><img src="content/eight.png"></div>
                <div class="col-md-6"><img src="content/nine.png"></div>
            </div>
        </div>
        <div class="col-md-3">
            <img src="content/ten.png">
        </div>
    </div>

</div>

Screenshot of the grid - http://i.stack.imgur.com/a3YBr.jpg

Answer 1

Your grid syntax is incorrect: your first row div has col-md-6, col-md-6, col-md-9 and col-md-3 as children. Bootstrap grid system has 12 columns, not 24.

Maybe try something like this (wrapped col-md-9 and col-md-3 into a new row div):

<div class="container">

    <div class="row">
        <div class="col-md-6">
            <img src="content/one.png">
        </div>

        <div class="col-md-6">
            <div class="row">
                <div class="col-md-6"><img src="content/two.png"></div>
                <div class="col-md-6"><img src="content/three.png"></div>
            </div>
            <div class="row">
                <div class="col-md-6"><img src="content/four.png"></div>
                <div class="col-md-6"><img src="content/five.png"></div>
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-md-9">
            <div class="row">
                <div class="col-md-3"><img src="content/six.png"></div>
                <div class="col-md-9"><img src="content/seven.png"></div>
            </div>
            <div class="row">
                <div class="col-md-6"><img src="content/eight.png"></div>
                <div class="col-md-6"><img src="content/nine.png"></div>
            </div>
        </div>
        <div class="col-md-3">
            <img src="content/ten.png">
        </div>
    </div>

</div>

Answer 2

I used your grid syntax on a clear bootply, removed the images and it seems to be working OK. You haven't made jsfiddle or bootply, so it's not possible to help you further without it. Here's what your grid looks like with only text:

Bootply example

Try adding img-responsive class to all images inside columns to prevent them from overflowing columns they are in.