I have a table like so:
Try applying Use rows to create horizontal groups of columns.
Content should be placed within columns, and only columns may be immediate children of rows. -- Bootstrap css docs note that Rows must be placed within a class="row" for the elements.
.container (fixed-width) or .container-fluid (full-width) for proper alignment and padding, so you might want to apply class=container-fluid for the table or a parent of it.