There are 6 buttons, the second one has something inside. But I defined all the buttons a fixed height and the inside content is not using up the room at all. Why it's still not in the expected position?
Please take a look at this simple code:
button {height:60px;width:50px;border:1px solid #000;box-sizing:border-box}
button span {display:block;color:grey; font-size:9px}
<button>1</button>
<button>2<span>2.1</span></button>
<button>3</button>
<button>4</button>
<button>5</button>
<button>6</button>