I've had enough of re-iterating the same old points and I concede that I'll never get through to those who have already made their minds up, so I'll shut up now.
SysEng,
Please remember that not everybody here has made his mind up
This is just a guess (probably flawed)
I saw the picture you posted about the TL mechanism and I tried to figure out how a "broken" or "loose" link between the pushrods, artificial feel unit and TLA sensor box could eventually yield that wrong TLA reading at the right TL idle stop.
Maybe the artificial feel unit and the TLA sensor box pushrod link was somehow loose (The last pushrod from top to bottom being "below" his correct position) thus marking a "negative" TLA reading.
But this would not explain the correct TLA reading for the other TL positions (CLIMB, etc).