why does my ListView-item background color change

[drakking8]

my application looks like this: ListView1 with N items(rows) as main menu --> ListView2 as sub menu for every N-item in ListView1.I m using the holo light theme and the Sherlock Action Bar library. When launching the app and selecting (long or short press) one item in LV1 the regular holo light blue background color of that item row shows. Now, when getting navigated to the sub menu LV2 the background colors of those items are always of a different darker blue. Why?Moreover, being in LV2 and using the ActionBar Home Icon to get back to LV1, now any selected row will show the same darker blue color as well. However, when I now select the same LV1 item as before and go back again to LV1 by using the Home Icon the background color is again the expected holo light blue. I hope you can follow me:App launch -> LV1 holo blue -> LV2 dark blue -> LV1 dark blue -> LV2 dark blue -> LV1 holo blue -> etc. This doesnt happen when i m using the back button for navigating from LV2 back to LV1.Thanks for any help in advance