Shift charts

I have 2 charts showing the same information on a dashboard, but one of them shifts this information a day. Like in the first picture.

The problem is that when I zoom out everything is fine and charts are aligned like in the first picture. BUT, If I zoom in, the charts start to show misaligned dates (picture 2). I don't know if this is a bug or not. The only difference between both charts is that the second one has the date shifted by one day using a JSON input script:

 {
 "script": "_value+1*24*3600*1000"
 }

I use a JSON input script because there is no way to create Date scripted fields.

How can I properly do this without misaligned the dates?

I'm using Kibana 4.5.4 and I tested it also in 4.6.1