There is something very wrong. the first shot (the one showing Bias-T config 0x08) is basically saying the LNB power chip is not controlled by the cpu, and has reverted to its default setup of 13v.
The last shot shows everything normal.
maybe @zoltan has an idea. I can just suggest one more thing to try. Without rebooting - if you start off at that last shot (with the 1-foot MK1 connected) and then disconnect that and reconnect the 500feet cable (carefully, without risking shorting the SMA during the connection/disconnection) - and then refresh the LNB status (by selecting it again from the left pane) - does that change back to the 0x08 value from the 0x8b value?