That x2 showing could either mean the card is not working properly, or the mobo/PCI-e slot is not working properly. Have you gotten both cards to work at 16x in the first slot? Have you tried a card in the second slot by itself?
I think that it is the card. The card now in the pciex16_1 slot was showing a max speed of x16 while disabled in the pciex16_2 slot. The other card has only registered x2 max speed in either slot. However, I also went into Control Panel and turned off power management for PCIE to prevent the cards fron shutting down under low loads in between. My lcd maxes out at 1920 x 1200 resolution, so I figure with just Windows running, I am definitely not stressing the system at all.
I am going to get another card to try. Thank you for the help!