Cisco Firewall :: ASA 5500 / 5580 Syslog Keeps Sending To Old Server

We use multiple ASA 5500/5580 cluster systems running  8.3 software versions.Actually we send all our FW syslog data to a SIEM appliance in a DMZ on a remote firewall (non-asa). Recently we suffered a strange incident while implementing a new SIEM collection station now situated in a dmz that is located on one of the ASA contexts. We redirected the syslog streams to the new client for one of the contexts on the ASA cluster that holds the new SIEM agent DMZ..since we did this and redirected the syslog we see double traffic and spoofing errors on that context
 
a/ the ASA keeps sending out the syslog traffic to the OLD SIEM agent server ip (there is however no trace of its ip in the config)

b/ the traffic leaving the interconnection interface towards the OLD SIEM agent gets a SPOOFING error on the traffic

c/ strangely the data gets also correctly forwarded to the new SIEM collection stations.
 
We started out with redirecting traffic on only one of the 5 contexts to the new environment and kept logging the others to the old system.I finally got out of the issue by reconfiguring al the other contexts to forward their syslog towards the same new server , since that moment we no longer have the double logging and spoofing error , all syslog traffic goes correctly to the new SIEM agent. It looked like some remenants of the old syslog config remainded on the asa event after deleting and introducing a new config line (we used the asdm to execute the action) as said either it kept the old config or it looked in the other context and "decided" to keep sending to the old server also mentioned in that syslog can find the behaviour in any buglists either way.