diff --git a/README.md b/README.md
index 68c50ca..0e46df1 100644
--- a/README.md
+++ b/README.md
@@ -323,5 +323,11 @@ where ERROR_NUMBER is the http error code (e.g. 503.http)
 docker build -t byjg/easy-haproxy .
 ```
 
+## Limitations
+
+EasyHAProxy has some limitations when there is more than one easy-haproxy container running: 
+- Replicas can be out-of-sync for a few seconds, because each replica will discover the pods separatedly. 
+- Each replica will request a Letsencrypt certificate and it can fail because the letsencrypt challenge can be directed to the other replica. 
+
 ----
 [Open source ByJG](http://opensource.byjg.com)
diff --git a/assets/scripts/haproxy-reload.sh b/assets/scripts/haproxy-reload.sh
index ee29cd0..1945cbc 100755
--- a/assets/scripts/haproxy-reload.sh
+++ b/assets/scripts/haproxy-reload.sh
@@ -16,7 +16,7 @@ else
     touch ${CONTROL_FILE}
 
     if [[ "$EASYHAPROXY_DISCOVER" == "docker" ]]; then
-        CONTAINERS=$(docker ps -q)
+        CONTAINERS=$(docker ps -q | sort | uniq)
         LABEL_PATH=".Config.Labels"
 
         for container in ${CONTAINERS}; do