The FormView used to enter claim details has been widened as indicated. To see this, search for a valid policy holder name such as 'grace', show their policies and claims, then enter a new claim.
FindPolicyHoldersExercises.aspx
Viewing the source for this control, it has a local style with the setting Width="376px". You may prefer to use percentages, rather than pixels, to achieve this effect in a more flexible way.