diff --git a/src/main/java/ru/ulstu/controller/IndexController.java b/src/main/java/ru/ulstu/controller/IndexController.java
index 4a329cc..f034573 100644
--- a/src/main/java/ru/ulstu/controller/IndexController.java
+++ b/src/main/java/ru/ulstu/controller/IndexController.java
@@ -99,11 +99,10 @@ public class IndexController {
     }
 
     private List<String> getDatesForChart(TimeSeries timeSeries, TimeSeries forecast) {
-        return Stream.concat(timeSeries.getValues().stream(), forecast.getValues().stream())
+        return Stream.concat(timeSeries.getValues().stream(), forecast.getValues().stream().skip(1))
                 .map(TimeSeriesValue::getDate)
                 .sorted()
                 .map(date -> date.format(DateTimeFormatter.ofLocalizedDate(FormatStyle.SHORT)))
-                .distinct()
                 .collect(Collectors.toList());
 
     }
diff --git a/src/main/java/ru/ulstu/service/MethodParamBruteForce.java b/src/main/java/ru/ulstu/service/MethodParamBruteForce.java
index f065f8f..c8e76a9 100644
--- a/src/main/java/ru/ulstu/service/MethodParamBruteForce.java
+++ b/src/main/java/ru/ulstu/service/MethodParamBruteForce.java
@@ -16,6 +16,7 @@ import java.lang.reflect.InvocationTargetException;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.Comparator;
+import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.TreeMap;
@@ -51,7 +52,8 @@ class MethodParamBruteForce {
         }
 
         Map<LocalDateTime, Double> tsValues = timeSeries.getValues().stream()
-                .collect(Collectors.toMap(TimeSeriesValue::getDate, TimeSeriesValue::getValue));
+                .collect(Collectors.toMap(TimeSeriesValue::getDate, TimeSeriesValue::getValue,
+                        (oldValue, newValue) -> oldValue, LinkedHashMap::new));
 
         for (Method method : methods) {
             List<List<MethodParamValue>> availableParametersValues = getAvailableParametersValues(timeSeries, method.getAvailableParameters());
@@ -134,7 +136,8 @@ class MethodParamBruteForce {
         List<ModelingResult> results2 = new CopyOnWriteArrayList<>();
 
         Map<LocalDateTime, Double> tsValues = timeSeries.getValues().stream()
-                .collect(Collectors.toMap(TimeSeriesValue::getDate, TimeSeriesValue::getValue));
+                .collect(Collectors.toMap(TimeSeriesValue::getDate, TimeSeriesValue::getValue,
+                        (oldValue, newValue) -> oldValue, LinkedHashMap::new));
 
         for (Method method : methods) {
             List<List<MethodParamValue>> availableParametersValues = getAvailableParametersValues(timeSeries, method.getAvailableParameters());