Trying to get a "Is between" date filter to work... it is returning an offset by + 1 days. Please see my website to see what i'm talking about: http://apollo.tbc.iit.edu/~spaceweather/sw_test/?q=download-cases-data#

Ive found some examples and posts on how to do this but even after following them i'm still having issues.

I'm trying to filter the results shown in a table. I want the dates in between the two specified dates a user might put in.

When I select 05/24/2013-05/26/2013 I get an offset of 05/25/2013-05/27/2013 for the results. Can anyone help with this?  I'm storing the date as a Unix time stamp.

Thank you for your help!

(*Note my website has been updated according to the suggestion below by @adem .)
The filter type must be "single filter", 
operator must be "is between", as demonstrated in this screenshot: