I do not understand the 1st problem. I read it twice, but I don't get it.
The second problem, in Fifth Race it clearly followed the [A, B, C, F, G, H, D, I] order, that's how we have it stablished, I don't remember about Rising. I also expected it would follow the [A, B, C, F, G, H, D, E, I] order for 9 chevrons, but probably it's a thing you input into the DHD. With a normally untampered DHD, those are only prepared for 7 chevron dialing, and the power source is made only for "local" travel. That's why maybe the computer doesn't allow you to dial further. But if it gets enough input power, and the computer it's told so, it switches from a "7 mode" to an "8 mode" or even a "9 mode". Probably the "9 mode", due to it's characteristics, it engages all chevrons in a sequential order.
Cheers