Google analytics web data vastly different than the core reporting API data

I am trying to pull the exact same data i am seeing in my dashboard via the core reporting API for Google Analytics. However I just dont seem to understand why the data can be so different even for the same time period and metrics!

From my web UI this is my table structure in the dashboard.

**Display the following columns:**Dimension: Month of YearMetric: Pageviews**Filter this data:**Only show **Page** containing "/blog/"

And this is what i see in my web UI fore period 09/26/2013 to 12/26/2013:

Month of Year   Pageviews   201312           151,502201311           136,856    201310           183,555    201309            22,689

In my script, I use the exact same metrics (except for naming convention differences between the web and API metrics):

dimensions = ga:yearMonthstart-date = 2013-09-26start-index = 1metrics = [u'ga:pageviews']filters = ga:pagepath=@/blog/end-date = 2013-12-26

And this is what i see:

Rows:201312  148626201311  160769201310  154770201309  16099

Report Infos:

Contains Sampled Data = FalseKind                  = analytics#gaDataID                    = https://www.googleapis.com/analytics/v3/data/ga?ids=ga:xxxxxx&dimensions=ga:yearMonth&metrics=ga:pageviews&sort=-ga:yearMonth&filters=ga:pagepath%3D@/blog/&start-date=2013-09-26&end-date=2013-12-26Self Link             = https://www.googleapis.com/analytics/v3/data/ga?ids=ga:xxxxxx&dimensions=ga:yearMonth&metrics=ga:pageviews&sort=-ga:yearMonth&filters=ga:pagepath%3D@/blog/&start-date=2013-09-26&end-date=2013-12-26Pagination Infos:Items per page = 1000Total Results  = 4

So as we can see, the data format is correct but the data inside is wrong. Whats worse is that the data trend is different.