diff --git a/DataFormats/simulation/src/DigitizationContext.cxx b/DataFormats/simulation/src/DigitizationContext.cxx
index 9e8a125c06fa4..b05889300340c 100644
--- a/DataFormats/simulation/src/DigitizationContext.cxx
+++ b/DataFormats/simulation/src/DigitizationContext.cxx
@@ -577,7 +577,7 @@ void DigitizationContext::applyMaxCollisionFilter(std::vector<std::tuple<int, in
     if (indices_old_to_new.find(lastindex) != indices_old_to_new.end()) {
       std::get<1>(tf_indices) = indices_old_to_new[lastindex]; // end;
     } else {
-      std::get<1>(tf_indices) = newrecords.size(); // end;
+      std::get<1>(tf_indices) = newrecords.size() - 1; // end; -1 since index inclusif
     }
     if (indices_old_to_new.find(previndex) != indices_old_to_new.end()) {
       std::get<2>(tf_indices) = indices_old_to_new[previndex]; // previous or "early" index
@@ -591,11 +591,6 @@ void DigitizationContext::applyMaxCollisionFilter(std::vector<std::tuple<int, in
 std::vector<std::tuple<int, int, int>> DigitizationContext::calcTimeframeIndices(long startOrbit, long orbitsPerTF, double orbitsEarly) const
 {
   auto timeframeindices = getTimeFrameBoundaries(mEventRecords, startOrbit, orbitsPerTF, orbitsEarly);
-  LOG(info) << "Fixed " << timeframeindices.size() << " timeframes ";
-  for (auto p : timeframeindices) {
-    LOG(info) << std::get<0>(p) << " " << std::get<1>(p) << " " << std::get<2>(p);
-  }
-
   return timeframeindices;
 }
 
@@ -708,7 +703,7 @@ DigitizationContext DigitizationContext::extractSingleTimeframe(int timeframeid,
     auto tf_ranges = timeframeindices.at(timeframeid);
 
     auto startindex = std::get<0>(tf_ranges);
-    auto endindex = std::get<1>(tf_ranges);
+    auto endindex = std::get<1>(tf_ranges) + 1;
     auto earlyindex = std::get<2>(tf_ranges);
 
     if (earlyindex >= 0) {
diff --git a/Steer/src/CollisionContextTool.cxx b/Steer/src/CollisionContextTool.cxx
index 1733caaa92eed..710476bed32f9 100644
--- a/Steer/src/CollisionContextTool.cxx
+++ b/Steer/src/CollisionContextTool.cxx
@@ -565,9 +565,20 @@ int main(int argc, char* argv[])
   LOG(info) << "-------- DENSE CONTEXT ------->>";
 
   auto timeframeindices = digicontext.calcTimeframeIndices(orbitstart, options.orbitsPerTF, options.orbitsEarly);
+  LOG(info) << "Fixed " << timeframeindices.size() << " timeframes ";
+  for (auto p : timeframeindices) {
+    LOG(info) << std::get<0>(p) << " " << std::get<1>(p) << " " << std::get<2>(p);
+  }
+
   // apply max collision per timeframe filters + reindexing of event id (linearisation and compactification)
   digicontext.applyMaxCollisionFilter(timeframeindices, orbitstart, options.orbitsPerTF, options.maxCollsPerTF, options.orbitsEarly);
 
+  LOG(info) << "Timeframe indices after collision filter";
+  LOG(info) << "Fixed " << timeframeindices.size() << " timeframes ";
+  for (auto p : timeframeindices) {
+    LOG(info) << std::get<0>(p) << " " << std::get<1>(p) << " " << std::get<2>(p);
+  }
+
   // <---- at this moment we have a dense collision context (not representing the final output we want)
   LOG(info) << "<<------ FILTERED CONTEXT ---------";
   if (options.printContext) {