Rear Sway Bar ?

Frankly, it looks home made. I've never seen one like it.

On the topic of 'sway bars'... I just had rear end links/bushings replaced (2012) to correct that fairly common knocking-rattling noise... Now, my driver side rear sits an inch higher--not happy at all. I'll get it back to the shop but what would be the most common "mistake" or adjustment that would cause this?? Any help appreciated so I'm armed with a bit of knowledge.. Thanks.