Difference in Number of URLS in "Crawl, Sitemaps" & "Index Status" in Webmaster Tools, NORMAL?

[Kingalan1]

Greetings MOZ Community:

Webmaster Tools under "Index Status" shows 850 URLs indexed for our website (www.nyc-officespace-leader.com). The number of URLs indexed jumped by around 175 around June 10th, shortly after we launched a new version of our website. No new URLs were added to the site upgrade.

Under Webmaster Tools under "Crawl, Site maps", it shows 637 pages submitted and 599 indexed.

Prior to June 6th there was not a significant difference in the number of pages shown between the "Index Status" and "Crawl. Site Maps". Now there is a differential of 175.

The 850 URLs in "Index Status" is equal to the number of URLs in the MOZ domain crawl report I ran yesterday.

Since this differential developed, ranking has declined sharply. Perhaps I am hit by the new version of Panda, but Google indexing junk pages (if that is in fact happening) could have something to do with it.

Is this differential between the number of URLs shown in "Index Status" and "Crawl, Sitemaps" normal?

I am attaching Images of the two screens from Webmaster Tools as well as the MOZ crawl to illustrate what has occurred.

My developer seems stumped by this. He has submitted a removal request for the 175 URLs to Google, but they remain in the index. Any suggestions?

Thanks,
Alan

[EcommerceSite]

If you had a jump of 175 right after a new site launch it seems like Google has found new pages. Have you tried running Screaming Frog to check for broken links or anything out of the ordinary?

I am not sure what is normal but in my experience on larger sites there is often a difference between what is indexed and what is on the sitemap.

[Kingalan1]

Hi Niners:

I have run a Xenu link report and there are no broken links or anything out of the ordinary.

Could having additional pages indexed by Google devalue a site in Google's eyes? The additional pages co-incide with a decline in ranking.

Thanks,
Alan