diff --git a/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/ActivityIndexQueries.java b/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/ActivityIndexQueries.java
index e085dff40..dc0cd823c 100644
--- a/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/ActivityIndexQueries.java
+++ b/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/ActivityIndexQueries.java
@@ -423,7 +423,7 @@ public class ActivityIndexQueries {
                 statement.setString(3, serverUUID.toString());
 
                 // Have played in the last half of the time frame
-                long half = before + (before - after) / 2;
+                long half = before - (before - after) / 2;
                 statement.setLong(4, half);
                 statement.setLong(5, before);
                 statement.setString(6, serverUUID.toString());
@@ -464,7 +464,7 @@ public class ActivityIndexQueries {
                 statement.setString(3, serverUUID.toString());
 
                 // Have played in the last half of the time frame
-                long half = before + (before - after) / 2;
+                long half = before - (before - after) / 2;
                 statement.setLong(4, half);
                 statement.setLong(5, before);
                 statement.setString(6, serverUUID.toString());
diff --git a/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/NetworkActivityIndexQueries.java b/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/NetworkActivityIndexQueries.java
index a22aaa670..3612bb2d8 100644
--- a/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/NetworkActivityIndexQueries.java
+++ b/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/NetworkActivityIndexQueries.java
@@ -405,7 +405,7 @@ public class NetworkActivityIndexQueries {
                 statement.setLong(2, after);
 
                 // Have played in the last half of the time frame
-                long half = before + (before - after) / 2;
+                long half = before - (before - after) / 2;
                 statement.setLong(3, half);
                 statement.setLong(4, before);
                 setSelectActivityIndexSQLParameters(statement, 5, threshold, before);
@@ -442,7 +442,7 @@ public class NetworkActivityIndexQueries {
                 statement.setLong(2, after);
 
                 // Have played in the last half of the time frame
-                long half = before + (before - after) / 2;
+                long half = before - (before - after) / 2;
                 statement.setLong(3, half);
                 statement.setLong(4, before);
                 setSelectActivityIndexSQLParameters(statement, 5, threshold, before);
diff --git a/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/PlayerCountQueries.java b/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/PlayerCountQueries.java
index 077dd960f..bb49887c2 100644
--- a/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/PlayerCountQueries.java
+++ b/Plan/common/src/main/java/com/djrapitops/plan/db/access/queries/analysis/PlayerCountQueries.java
@@ -364,7 +364,7 @@ public class PlayerCountQueries {
                 statement.setString(3, serverUUID.toString());
 
                 // Have played in the last half of the time frame
-                long half = before + (before - after) / 2;
+                long half = before - (before - after) / 2;
                 statement.setLong(4, half);
                 statement.setLong(5, before);
                 statement.setString(6, serverUUID.toString());