Why is SEOMOZ Crawl Diagnostics not in sync with Webmaster Tools

[ABCPS]

Currently, my Website, according to the Crawl Diagnostics Summary, has 401 'Duplicate Page Title Errors'.

But in Google Webmaster Tools, under Óptimization on the Left hand Side Toolbar, if you look up HTML Improvements, there are only 4 'Duplicate Title Tags'.

I have two questions re this:

A) Do 'Duplicate Page Title Errors' and 'Duplicate  Title Tags' have the same meaning' ? , and

B) why are there 401 errors located by the former, and just 4  by the latter?

[JoelDay]

Hi Anthony,

Thanks for the question. I took a look at your campaign and those errors specifically and they are indeed duplicates of each other. I won't go into more details as this is a public question. If you want a few examples I'd be happy to start a support ticket for you.

Essentially it appears you have a lot of pages that all have the same title and are all canonicalized to themselves so as far as our bot is concerned they are all independent pages.

Why GWT would report differently than your sites actual information, I could not tell you. This issue is easily verifiable by visiting the pages reported as having the duplicates.

If you'd like to discuss this in greater detail feel free to shoot us an email. help[at]seomoz.org

Cheers,
Joel.

[alsvik]

It seem as if Rogerbot doesn't read and comply with robots.txt - and sometimes ignore "nofollow noindex". For about a month i have had issues with an extreme high amount of errors and warnings, that i already dealt with.

Im still waiting for Seomoz to fix it. I think they are working on it. But i dont know.