Make sure that your dashboard action for the right MoreInfo2 does not have any target sheets on the left side of the dashboard. The action should only be targeted at the Sheetname2 sheets on your dashboard in order for the MoreInfo2 action to not affect the other side.
This means you will have to create a dashboard action from scratch in the Dashboard --> Actions menu. Add a new filter with MoreInfo2 as the source with it targeting all the Sheetname2 sheets
Great that worked! Thanks