objective c - finding duplicated on outletCollection -

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i'm beginner in objective-c, coming c#, when creating outletcollection of uibutton, noticed following behavior if connect same button outletcollection again , again there no error or warning letting me know object associated outlet. opened storyboard file in editor , found there connections different id's, pointing same destination (representing object id), place saw duplication , button happened on @ connection inspector

my questions: a) reason , logic behind behavior (letting me set same connection
multiply times)? b) there way change object id or associate name (like in c#)? c) there way or place find kind of mistakes cause in case there many buttons(or other objects) take long time go 1 one finding duplicate one.

thanks


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