It looks like your first issue is because the jquery uses the selector .theDiv and a class theDiv is added to each item in the repeater.  If you have a data key that is unique to each item then use it to append to the class name and the selector.  This way the jquery you call from the item will have a selector unique to that item.

Not sure what you are trying to do with the second issue.  Perhaps if you explain again, I might be able to help.