Package file was not signed correctly on some devices while downloading from app store (Works on Nexus 5)

• Titanium SDK: 3.1.3
• Platform:Android
• Device: Nexus 5 and Samsung Duos
• Android SDK : Google APIs (2.3.3)[armeabi]
• OS: Mac Mevericks
• Titanum Studio: 3.2.0

Hi,

I am getting "Package file was not signed correctly" on some devices while downloading from play store (Works on Nexus 5). I had created the keystore from the studio itself. When I build the app for distribution, It builds successfully. After uploading it on play store I can download this on Nexus 5 (4.4.2) but when I try to download it on samsung duos(4.1.2) I get error. If this is a signing error then it should not work on 4.4.2 too. My minimun android sdk is 2.3.3.