Why are results different on Rank Tracker tool and New Rankings Weekly Reports?

[Prime85]

Good Morning...

Every week i get an email from SEO Moz that is showing me where the keywords i am tracking are currently in the SERPS (New Rankings and On-Page Reports)...

Is there a reason that the current rank shown on these emails would be so different than what is shown when i use SEO Moz's rank tracker?

For example, it shows one keyword has a rank of 48 (via email) and a rank of 16 through the rank tracker.

What would cause such a great discrepancy?

Thanks

[MeganSingley]

Hi Prime85!  This is Megan from the SEOmoz Help Team.  Sorry to hear about the discrepancies between your campaign rankings and rank tracker!  We'd love to take a look at this to see what's going on.  Can you send an email to help[at]seomoz.org with the following information?:

1. Campaign name

2. Keyword examples

3. Ranking in campaign vs. rank tracker

Once we receive the above information, we'll check it out asap!  Thanks!

[Prime85]

i sent that info to the email address you provided.

thanks