I am using jdev 18.104.22.168.0 and weblogic server 10.3.23 and java 1.6.0_14.
<MetadataService$Bootstrap><add> ADFc: Duplicate managed bean definition for 'LimitManagedBean' detected.
<MetadataService$Bootstrap><add> ADFc: /WEB-INF/adfc-config.xml:
The bean with the name LimitManagedBean has been defined twice which is not allowed.
Open the adfc-config.xml file and open the 'Managed Beans' section. There you check if the bean name 'LimitManagedBean' has two entries. If you only find one check faces-config.xml for an other definition and then all your other task flow definition files.