Made an Occupation System v117.1

Hi all! :)

I managed to make an occupation system for my v117.1 server using HeliosMS v83 source.
I have 1 question and 1 issue:

Question:
I want to make a command that changes or multiplies a certain rate in the server ONLY for the player who used the command, what line do I use?

Issue:
The occupations are saved in MySQL, column details:
occupation, INTEGER(11), NOT NULL (ticked), UNSIGNED & ZEROFILL (unticked), default value 1.
1 is the default occupation.

The problem is that after going into the cash shop, you go back to occupation 1.
After picking your occupation you can reload, relog, anything, but once you go into CS it's back to default :\

Why is that? How can I fix it?

Thanks in advance! :)