Issue with Message Staging and Logging Options in AAE of PI 7.4

Hello Experts,

As I was facing issue with "To be Delivered" messaages on PI 7.4 system, I happened to go through below blog. I maintained logging and stagging parameters in Advance tab of Integrated configurations and it worked. All the scenarios started working without any issue.

http://scn.sap.com/community/pi-and-soa-middleware/blog/2012/11/06/message-staging-and-logging-options-in-advanced-adapter-engine-of-pi-73x

Could you please suggest if my ICo should use "Global Configuration" or "Scenario specific configuration"? What is Best Practice recomended by SAP.

What could be the reason that all messages are going into To be Delivered state when Global configuration option is set by default.

I can see Java system properties with below values. Please suggest if there is something wrong with these configuration.

xiadapter.stage.conf : BI=2,MS=3,VO=3,AM=2,

Thanks in advance,

Vinit.