I am losing Goog Pages BIG TIME! Is this normal!

It might be normal from a few of the posts that I have read but when I installed vbSEO 2 months ago I had about 21K indexed pages in Goog and now it is down to 8400

Is this normal or am I going down in flames?

Are you monitoring your organic referrals?

Duplicate entries are being purged from the index, so a SERP decrease is expected. However, your search engine traffic should be up!

I suspect it's the same situation as with this vBSEO'ed forum:
http://www.vbseo.com/f84/cant-real-2...tml#post138497

Again, you should monitor/compare your search engine traffic via Analytics.