lol....I don't even remember the first experience. But you're welcome.
What you can do, is try two configurations.
-Alternating order.....1 x 1GB / 1 x 256MB / 1 X 1GB / 1 X 256MB or the 1GB sticks next to each other, and the 256MB sticks next to each other.
One of them, has to be dual channel. Just try both and look if it's in dual channel mode.
edit: I see in your previous screenshot, of your memory sticks, it does say Dual mode at the top right, when you had the 256MB sticks in. So how is it configured on the motherboard?
I guess ill find out when I crack open the case. Could I just put the 1's in the remaining slots? Or would I want to replace the 128's with the 1's and put the 128's in the remaining slots. Or would that not make sense/be worth it.