Not switching tasks

When I click the “select a new work Item to time” icon, it just changes the title of the work item I was just working on thus not recording time for a previous task and incorrectly assigning time spent on a new task.

Why is this happening?

I noticed this, too. It only starts a new item if I check the plus sign for “Create New Time Slice”. It did not do that in the past; then Grindstone4 would start another item if I chose a different Work Slice. How do I fix this?