Generally, 1 is left and 2 is right when the card is installed and used by a program. When setting up a recording rig, you have more control over the assignments for the inputs and outputs, especially when using jack, ardour, jamin, etc.
I have a couple of recording computers with Delta 1010lt pci cards installed. I installed them on distros designed for recording (64studio and Ubuntu Studio), and since that may have been easier to set-up, I am not sure if I am going to help or hurt your cause.
Was the card recognized by the system? I will assume it was. Do you use jack for sound? If you are going to set up the card for recording, I am sure you will want that set up. Also, the Delta 44 is an ice1712 based card, and therefore can be operated with the Envy 24 control program. If you can download Envy, the interface is very easy to work with, and you can see that you have control over the inputs and outputs of the card just like the mixer software for the card in windows.