[Q] Questions about partitioning the SD card

I have some questions about partitioning SD card. I created 2 partitions (FAT32 and EXT4 as the primary - in the proportion of 3GB and 13GB). I plugged the card to the phone using Link2SD. After starting the phone I pointed the file system of the second partition and check the option to automatically move applications to the SD card (of course with the reboot in the meantime) ...

And now the questions:

• First - I thought that after the creation of the partition, my space in the "phone" for the application will increase - from standard 150Mb to 3.15 Gb. It didn't happen - after installing some applications I have about 50Mb left.
• Second. As I wrote in my first point - theoretical - if the memory of "telephone" has been increased, the second partition should be used as a standard memory of the directories created by the system. Meanwhile, all of the files and applications are installed on the first partition who has 3BG? Is this how it should be?

Thanks for any help.