Couple of questions to be answered may help with resolution:

What were the conditions under which this was working properly before? (ZC version, php version, etc... What of those has changed since it was last verified functional and for example the php version may have been changed by your host.)
What has changed that you know of since the last time you verified this functionality?
As for any type of "automatic" ZC update, ZC doesn't push updates to the server (at this time), so the only automatic update I could think of is if you upgraded your ZC software through a one-click install program instead of following any of the published procedures.
I see/saw what it looks like now, not sure I understand what it was supposed to look like, but yes below the dropdown selecter there are several overlapping images all very large. Do you know/have the software that was installed to make this perform as desired and does it need to be reinstalled?
Any error logs in your logs folder (myDebugxxx)?