Try this, you will get the deployment target from lowerEnd. This is mainly due to the fact that> Xcode 5.0 uses architecture by default , including 64-bit , it only supports iOS 6.0 
iPhone 5S is powered by A7 64bit processor . From apple docs
Xcode can create your application with both 32-bit and 64-bit binaries enabled. This combo binary requires a minimum deployment target of iOS 7 or later.
Note. The future version of Xcode will allow you to create one application that supports the 32-bit runtime on iOS 6 and later and supports the 64-bit runtime on iOS 7.
source share