5 files changed, 7 insertions, 7 deletions
diff --git a/classes/iterators/IsisItemIterator.php b/classes/iterators/IsisItemIterator.php
index 9435146..f5ccd91 100644
--- a/classes/iterators/IsisItemIterator.php
+++ b/classes/iterators/IsisItemIterator.php
@@ -68,7 +68,7 @@ class IsisItemIterator implements Iterator
    * Move forward to next element.
    */
   function next() {
-    if ($this->item >= $this->items) {
+    if ($this->item >= $this->items - 1) {
       $this->item = 0;
       ++$this->row;
     }
@@ -81,6 +81,6 @@ class IsisItemIterator implements Iterator
    * Check if there is a current element after calls to rewind() or next().
    */
   function valid() {
-    return $this->row <= $this->rows;
+    return $this->row <= $this->rows - 1;
   }  
 }
diff --git a/classes/iterators/IsisMainItemIterator.php b/classes/iterators/IsisMainItemIterator.php
index 8bcbfe4..2c1784a 100644
--- a/classes/iterators/IsisMainItemIterator.php
+++ b/classes/iterators/IsisMainItemIterator.php
@@ -65,7 +65,7 @@ class IsisMainItemIterator implements Iterator
    * Check if there are more rows.
    */
   function has_more_rows() {
-    return $this->row <= $this->rows;
+    return $this->row < $this->rows - 1;
   }
 
   /**
diff --git a/classes/iterators/IsisMethodIterator.php b/classes/iterators/IsisMethodIterator.php
index 4d2bbd4..e5188d3 100644
--- a/classes/iterators/IsisMethodIterator.php
+++ b/classes/iterators/IsisMethodIterator.php
@@ -64,6 +64,6 @@ class IsisMethodIterator implements Iterator
    * Check if there is a current element after calls to rewind() or next().
    */
   function valid() {
-    return $this->position <= $this->total;
+    return $this->position < $this->total - 1;
   }  
 }
diff --git a/classes/iterators/IsisRowIterator.php b/classes/iterators/IsisRowIterator.php
index 739db22..0c1463f 100644
--- a/classes/iterators/IsisRowIterator.php
+++ b/classes/iterators/IsisRowIterator.php
@@ -53,6 +53,6 @@ class IsisRowIterator implements Iterator
    * Check if there is a current element after calls to rewind() or next().
    */
   function valid() {
-    return $this->row <= $this->rows;
+    return $this->row <= $this->rows - 1;
   }  
 }  
diff --git a/classes/iterators/IsisSubfieldIterator.php b/classes/iterators/IsisSubfieldIterator.php
index 2e213cf..2bc57c0 100644
--- a/classes/iterators/IsisSubfieldIterator.php
+++ b/classes/iterators/IsisSubfieldIterator.php
@@ -60,7 +60,7 @@ class IsisSubfieldIterator implements Iterator
    * Move forward to next element.
    */
   function next() {
-    if ($this->subfield >= $this->subfields) {
+    if ($this->subfield >= $this->subfields - 1) {
       $this->subfield = 0;
       ++$this->row;
     }
@@ -73,6 +73,6 @@ class IsisSubfieldIterator implements Iterator
    * Check if there is a current element after calls to rewind() or next().
    */
   function valid() {
-    return $this->row <= $this->rows;
+    return $this->row <= $this->rows - 1;
   }  
 }