Link2SD working issues
An application files consist of apk, dex, lib and data files. Link2sd can only move the first three types of files to your SD card. Program like Google+ has huge data files so even after using link2sd they take up precious space of internal memory.

When you move app to sd, only the apk file(in Android 2.2) and only the apk and lib files (in Android 2.3) are moved.