layout doesnt arrange as per screen orientation change multiple times in api10

Question

im working with my android app, where i used

          android:configChanges="keyboardHidden|orientation|screenSize"

so that the data from sqlite are not loaded all the time. it worked well for api 10 and api 18. i tested both of them by changing the orientation portrait and landscape a multiple times.

but now i am using api library AppCompat to add official action bar. the problem now is that using api18 and changing the orientation a multiple time,everything works as it should.

but changing orientation from

PORTRAIT to LANDSCAPE and back to PORTRAIT for api10

the data is still displayed as landscape. i am using GridView for portait numCol=1. landscape numCol=2. so for api10 when its in portrait mode it displays only 1 column which is perfect. just it doesnot display it in portrait view

left image API-18 and right image API-10