On multicolumn bootstrap form with labels on top, if one of the labels is large than column size, inputs will be not aligned. See the example on http://jsfiddle.net/yynkc2zn/
<div class="container">
<div class="row">
<form action="#">
<div class="form-group col-xs-3">
<label for="field1">This is large label for Field1</label>
<input type="text" class="form-control" id="field1" placeholder="field1">
</div>
<div class="form-group col-xs-3">
<label for="field2">Field2</label>
<input type="text" class="form-control" id="field2" placeholder="field2">
</div>
<div class="form-group col-xs-3">
<label for="field3">Field3</label>
<input type="text" class="form-control" id="field3" placeholder="field3">
</div>
<div class="form-group col-xs-3">
<label for="field4">Field4</label>
<input type="text" class="form-control" id="field4" placeholder="field4">
</div>
<div class="clearfix visible-xs"></div>
<div class="form-group col-xs-3">
<label for="field5">Field5</label>
<input type="text" class="form-control" id="field5" placeholder="field5">
</div>
<div class="form-group col-xs-3">
<label for="field5">Field6</label>
<input type="text" class="form-control" id="field6" placeholder="field6">
</div>
</form>
</div>
</div>
I've not found good solution for solve this problem. There are some standard solution using bootstrap classes?