Staging Question

Q1 : Tightening Works fro Wildcard while Staging works for Wildcard & Explicit , is this the difference , so why do we have 2 naming , we could have said Staging which works for both ?

 

 

Q2: For signature staging , i understood that during staging period ( let's say 7 days ) requests that triggers new signatures will be logged under Traffic learning sothat admin can determine to enforce it or not ........... also there is an option to enforce all signature that didnot trigger during staging period ( Manually ) , so the question is : after the 7 days period i will need to manually enforce signatures that were at staging but was not triggered , what if i didnot do that and just waited for 3 weeks for example will the logs for them still comes under traffic learning ? if yes so what is the meaning of the 7 days ( as i expected that after 7 days signatures are automatically enforced ) ?