div {border: 1px solid black;}


/* styles for Bug #1 */
/* notice that the last class selector is .cover for both */

	.girl.cover {
		background: green;
		}
	.boy.cover {
		background: red;
		}


/* styles for Bug #2 */
/* notice that the styles use the same id but different classes */

	#something.love {
		background: yellow;
	}
	#something.hate {
		background: aqua;
	}

Bug #1: multiple classnames don't work if the last class in the style selector is not unique.

Fix for Bug #1: change the order of the classnames in the css so that the last selector is unique (at least for the given ID, if using an ID).

Bug #2: using an ID and a classname together doesn't work at all if there are styles for that same ID with other classnames.