Image moves behind text

Since I split my post’s text into two columns the post’s images move behind the text – See here

I added this to my style.css –

.entry-content {
	  -moz-column-count: 2;
	  -moz-column-gap: 10px;
	  -moz-column-rule: none;
	  -webkit-column-count: 3;
	  -webkit-column-gap: 10px;
	  -webkit-column-rule: none;
	column-count: 3;
	column-gap: 10px;
	column-rule: none;
	}

What am I doing wrong?