diff --git a/src/core/peptideevidence.h b/src/core/peptideevidence.h
index 4e727774ddab1241266bf9027d1649cecbb6f765..8dc7dfa496e56a6d360d4f2f579f8d96cdcb2909 100644
--- a/src/core/peptideevidence.h
+++ b/src/core/peptideevidence.h
@@ -110,12 +110,12 @@ public :
     void updateAutomaticFilters(const AutomaticFilterParameters & automatic_filter_parameters);
 
     /** @brief get delta between theoretical mhplus mass and mhplus experimental mass
-     * theoretical mhplus mass - mhplus experimental mass
+     * mhplus experimental mass - theoretical mhplus mass
       */
     pappso::mz getDeltaMass() const;
     
     /** @brief get delta in ppm between theoretical mhplus mass and mhplus experimental mass
-     * @return theoretical mhplus mass - mhplus experimental mass
+     * @return mhplus experimental mass - theoretical mhplus mass
       */
     pappso::mz getPpmDeltaMass() const;
     
diff --git a/src/gui/peptide_list_view/peptidelistwindow.cpp b/src/gui/peptide_list_view/peptidelistwindow.cpp
index 5f0a477095e0af0d95591531cc630f31b9225afb..f313fe52764d8263f78322e20d617d1aaa95ec79 100644
--- a/src/gui/peptide_list_view/peptidelistwindow.cpp
+++ b/src/gui/peptide_list_view/peptidelistwindow.cpp
@@ -27,6 +27,7 @@
 
 #include "ui_peptide_view.h"
 
+
 PeptideListQactionColumn::PeptideListQactionColumn(PeptideListWindow * parent, PeptideListColumn column):QAction(parent) {
 
     this->setText(PeptideTableModel::getTitle(column));
diff --git a/src/gui/peptide_list_view/peptidetablemodel.cpp b/src/gui/peptide_list_view/peptidetablemodel.cpp
index 396aac97e7a535dc4902869cbaab8ad44185654c..3fb37addb217f522f359a3fdb2f0fd0ed8065348 100644
--- a/src/gui/peptide_list_view/peptidetablemodel.cpp
+++ b/src/gui/peptide_list_view/peptidetablemodel.cpp
@@ -189,7 +189,7 @@ QVariant PeptideTableModel::data(const QModelIndex &index, int role ) const {
                 return QVariant((qreal) (_p_protein_match->getPeptideMatchList().at(row).getPeptideEvidence()->getExperimentalMass()+pappso::MHPLUS));
                 break;
             case (std::int8_t)PeptideListColumn::theoretical_mhplus:
-                return QVariant((qreal) _p_protein_match->getPeptideMatchList().at(row).getPeptideEvidence()->getPeptideXtpSp().get()->getMz(1));
+                return QVariant(_p_protein_match->getPeptideMatchList().at(row).getPeptideEvidence()->getPeptideXtpSp().get()->getMz(1));
                 break;
             case (std::int8_t)PeptideListColumn::delta_mhplus:
                 return QVariant((qreal) _p_protein_match->getPeptideMatchList().at(row).getPeptideEvidence()->getDeltaMass());
@@ -369,10 +369,10 @@ const QString PeptideTableModel::getDescription(std::int8_t column) {
         return "peptide theoretical MH+";
         break;
     case (std::int8_t) PeptideListColumn::delta_mhplus:
-        return "peptide mass difference in dalton between theoretical mass and observed mass (theoretical - observed)";
+        return "peptide mass difference in dalton between observed mass and theoretical mass (observed - theoretical)";
         break;
     case (std::int8_t) PeptideListColumn::delta_ppm:
-        return "peptide mass difference in ppm between theoretical mass and observed mass";
+        return "peptide mass difference in ppm between observed mass and theoretical mass";
         break;
     case (std::int8_t) PeptideListColumn::hyperscore:
         return "X!Tandem hyperscore";
diff --git a/src/gui/peptide_list_view/peptidetablemodel.h b/src/gui/peptide_list_view/peptidetablemodel.h
index 5aa61a294e7b17faf044e8f61500e9b8dca05750..cde92b4753613c6d3a77d2d247567f4a1d1f4271 100644
--- a/src/gui/peptide_list_view/peptidetablemodel.h
+++ b/src/gui/peptide_list_view/peptidetablemodel.h
@@ -48,8 +48,8 @@ enum class PeptideListColumn: std::int8_t {
     used=13,
     subgroups=14,
     Evalue=15,
-    theoretical_mhplus=16,
-    experimental_mhplus=17,
+    experimental_mhplus=16,
+    theoretical_mhplus=17,
     delta_mhplus=18,
     delta_ppm=19,
     hyperscore=20,