diff --git a/engine/src/main/java/org/archive/crawler/framework/Engine.java b/engine/src/main/java/org/archive/crawler/framework/Engine.java
index 6068d1c7..d861e7fa 100644
--- a/engine/src/main/java/org/archive/crawler/framework/Engine.java
+++ b/engine/src/main/java/org/archive/crawler/framework/Engine.java
@@ -97,6 +97,9 @@ public class Engine {
                 // convert .jobpaths to the referenced external directory
                 jobFile = getJobDirectoryFrom(candidateFile);
             }
+            if (jobConfigs.containsKey(jobFile.getName())) {
+                continue;
+            }
             if(!addJobDirectory(jobFile)) {
                 LOGGER.log(Level.WARNING,"invalid job directory: " + jobFile 
                         + " where job expected from: " + candidateFile);
diff --git a/engine/src/main/java/org/archive/crawler/restlet/EngineResource.java b/engine/src/main/java/org/archive/crawler/restlet/EngineResource.java
index 17422268..5d28bb42 100644
--- a/engine/src/main/java/org/archive/crawler/restlet/EngineResource.java
+++ b/engine/src/main/java/org/archive/crawler/restlet/EngineResource.java
@@ -232,8 +232,6 @@ public class EngineResource extends BaseResource {
         
         ArrayList<CrawlJob> jobs = new ArrayList<CrawlJob>();
         
-        // re-scan job configs on each page load
-        engine.findJobConfigs();
         jobs.addAll(engine.getJobConfigs().values());
          
         pw.println("<form method=\'POST\'><h2>Job Directories ("+jobs.size()+")");