diff --git a/tools/arkmanager b/tools/arkmanager
index 1175383..c89b000 100755
--- a/tools/arkmanager
+++ b/tools/arkmanager
@@ -150,9 +150,6 @@ arkserverLog="arkserver.log"    # here is logged the output of ShooterGameServer
 
 appid="${appid:-376030}"
 mod_appid="${mod_appid:-346110}"
-arkautorestartfile="${arkautorestartfile:-ShooterGame/Saved/.autorestart}"
-arkserverpidfile="${arkserverpidfile:-ShooterGame/Saved/.arkserver.pid}"
-arkmanagerpidfile="${arkmanagerpidfile:-ShooterGame/Saved/.arkmanager.pid}"
 install_bindir="${install_bindir:-${0%/*}}"
 install_libexecdir="${install_libexecdir:-${install_bindir%/*}/libexec/arkmanager}"
 
@@ -516,7 +513,17 @@ function getServerPID(){
       return
     fi
   fi
-  ps -ef | grep "$arkserverroot/$arkserverexec" | grep -v grep | awk '{print $2}'
+  if [ -f "${arkserverroot}/${arkserveroldpidfile}" ]; then
+    serverpid="$(<"${arkserverroot}/${arkserveroldpidfile}")"
+    if kill -0 "$serverpid" >/dev/null 2>&1; then
+      echo $serverpid
+      return
+    fi
+  fi
+
+  if [ -z "$arkopt_clusterid" ]; then
+    ps -ef | grep "$arkserverroot/$arkserverexec" | grep -v grep | awk '{print $2}'
+  fi
 }
 
 #
@@ -875,7 +882,7 @@ doRun() {
 # start function
 #
 doStart() {
-  touch "${arkserverroot}/.startAfterUpdate"
+  touch "${arkserverroot}/.startAfterUpdate-${instance}"
 
   if [ -f "${arkserverroot}/.ark-update.lock" ]; then
     local updatepid="$(<"${arkserverroot}/.ark-update.lock")"
@@ -943,7 +950,7 @@ doStartAll(){
 #
 doStop() {
   if [ "$1" != "update" ]; then
-    rm -f "${arkserverroot}/.startAfterUpdate"
+    rm -f "${arkserverroot}/.startAfterUpdate-${instance}"
   fi
 
   if isTheServerRunning; then
@@ -997,6 +1004,10 @@ doStop() {
       fi
     fi
 
+    rm -f "${arkserverroot}/${arkserverpidfile}"
+    rm -f "${arkserverroot}/${arkserveroldpidfile}"
+    rm -f "${arkserverroot}/${arkmanagerpidfile}"
+
     tput rc; tput ed;
     echo "The server has been stopped"
     echo "`timestamp`: stopped" >> "$logdir/$arkmanagerLog"
@@ -1540,6 +1551,9 @@ doUpdate() {
         fi
       done
     fi
+    if [ -z "$bgupdate" ]; then
+      touch "${arkserverroot}/steamapps/appmanifest_${appid}.acf"
+    fi
   else
     echo "Your server is already up to date! The most recent version is ${bnumber}."
     echo "`timestamp`: No update needed." >> "$logdir/update.log"
@@ -1550,9 +1564,8 @@ doUpdate() {
   if ! isTheServerRunning; then
     # we restart the server only if it was started before the update
     if [ -z "$noautostart" ]; then
-      if [ $serverWasAlive -eq 1 ] || [ -f "${arkserverroot}/.startAfterUpdate" ]; then
-        rm -f "${arkserverroot}/.startAfterUpdate"
-        rm -f "${arkserverroot}/.ark-update.lock"
+      if [ $serverWasAlive -eq 1 ] || [ -f "${arkserverroot}/.startAfterUpdate-${instance}" ]; then
+        rm -f "${arkserverroot}/.startAfterUpdate-${instance}"
         doStart --noautoupdate
       fi
     fi
@@ -2377,6 +2390,10 @@ useConfig() {
     echo "Error: arkserverroot not set"
     exit 1
   fi
+  arkautorestartfile="${arkautorestartfile:-ShooterGame/Saved/.autorestart-${1}}"
+  arkserverpidfile="${arkserverpidfile:-ShooterGame/Saved/.arkserver-${1}.pid}"
+  arkserveroldpidfile="ShooterGame/Saved/.arkserver.pid"
+  arkmanagerpidfile="${arkmanagerpidfile:-ShooterGame/Saved/.arkmanager-${1}.pid}"
 }
 
 showUsage() {