diff --git a/librerie/exercise2/list/list.cpp b/librerie/exercise2/list/list.cpp
index 3396301..05c06d1 100644
--- a/librerie/exercise2/list/list.cpp
+++ b/librerie/exercise2/list/list.cpp
@@ -167,7 +167,7 @@ void List<Data>::InsertAtBack(const Data& data){
 template <typename Data>
 void List<Data>::InsertAtBack(Data&& data){
   if(size == 0){
-    InsertAtFront(data);
+    InsertAtFront(std::move(data));
   }
   else{
     struct Node* last = new Node(std::move(data));
diff --git a/librerie/exercise2/queue/vec/queuevec.cpp b/librerie/exercise2/queue/vec/queuevec.cpp
index 42f6857..a76066f 100755
--- a/librerie/exercise2/queue/vec/queuevec.cpp
+++ b/librerie/exercise2/queue/vec/queuevec.cpp
@@ -37,7 +37,7 @@ QueueVec<Data>::QueueVec(const QueueVec& toCopy){
 
 template <typename Data>
 QueueVec<Data>::QueueVec(QueueVec&& toMove) noexcept{
-    Clear();
+    Clear(); // the moved Queue will be in a consistent state
     std::swap(Elements, toMove.Elements);
     std::swap(rear, toMove.rear);
     std::swap(front, toMove.front);
@@ -140,7 +140,7 @@ bool QueueVec<Data>::Empty() const noexcept{
 
 template <typename Data>
 ulong QueueVec<Data>::Size() const noexcept{
-  //if(size == 0) return 0; // this won't ever get executed, it's here just in case  
+  //if(size == 0) return 0; // this won't ever get executed, it's here just in case
   return ((rear + size) - front) % size;
 }
 
diff --git a/librerie/exercise2/stack/lst/stacklst.cpp b/librerie/exercise2/stack/lst/stacklst.cpp
index f1f24d8..a9b6cdc 100755
--- a/librerie/exercise2/stack/lst/stacklst.cpp
+++ b/librerie/exercise2/stack/lst/stacklst.cpp
@@ -52,7 +52,7 @@ void StackLst<Data>::Push(const Data& element){
 
 template <typename Data>
 void StackLst<Data>::Push(Data&& element) noexcept{
-  List<Data>::InsertAtFront(element);
+  List<Data>::InsertAtFront(std::move(element));
 }
 
 template <typename Data>
diff --git a/librerie/exercise2/stack/vec/stackvec.cpp b/librerie/exercise2/stack/vec/stackvec.cpp
index eabb6ad..ca711d3 100755
--- a/librerie/exercise2/stack/vec/stackvec.cpp
+++ b/librerie/exercise2/stack/vec/stackvec.cpp
@@ -44,7 +44,7 @@ StackVec<Data>& StackVec<Data>::operator=(const StackVec<Data>& copyFrom){
 template <typename Data>
 StackVec<Data>& StackVec<Data>::operator=(StackVec<Data>&& moveFrom) noexcept{
   Vector<Data>::operator=(std::move(moveFrom));
-  stackSize = moveFrom.Size();
+  std::swap(stackSize, moveFrom.stackSize);
   return *this;
 }