Fix bug + misc found in feedback.

spec.bs

@@ -2385,7 +2385,7 @@ or "component-auction", a [=currency tag=] |componentAuctionExpectedCurrency|, a
   1. If |auctionConfig|'s [=auction config/seller real time reporting config=] is
     "`default-local-reporting`", then [=insert entries to map=] given |realTimeContributionsMap|,
     |seller|, and |realTimeContributions|.
-  1. [=set/Insert=] |reportingId| into |reportingContext|'s [=reporting context/bidder
+  1. [=set/Insert=] |reportingId| into |reportingContext|'s [=reporting context/seller
     participants=].
   1. [=Commit private aggregation contributions=] given |paContributions|, |reportingId|, and
     |reportingContext|.
@@ -4209,10 +4209,10 @@ an [=auction config=] |auctionConfig| and a [=reporting context=] |reportingCont
 1. Let |leadingBidInfo| be |reportingContext|'s [=reporting context/local leader info=].
 1. Let |bidderOnceRep| be null.
 1. If |reportingContext|'s [=reporting context/bidder participants=] [=set/is not empty=],
-  set |bidderOnceRep| to a random member of [=reporting context/bidder participants=].
+  set |bidderOnceRep| to a random [=set/item=] of [=reporting context/bidder participants=].
 1. Let |sellerOnceRep| be null.
 1. If |reportingContext|'s [=reporting context/seller participants=] [=set/is not empty=],
-  set |sellerOnceRep| to a random member of [=reporting context/seller participants=].
+  set |sellerOnceRep| to a random [=set/item=] of [=reporting context/seller participants=].
 1. [=map/For each=] (|bidId|, |event|) → |contributions| of
   |reportingContext|'s [=reporting context/private aggregation on event contributions=]:
   1. If |event| is "`reserved.win`" or does not [=string/start with=] "`reserved.`":