So per the discussion about the tongue sliding over in these boots, I have taken a couple picture of my Indy boots. I was having the same problem, and I had my cobbler sew one edge of the tongue to the side of the boot to keep it stable. It really is effective and helps the fits a lot for me.
You can see on the inside shot here how the stitching runs about an inch and a half long. This is important. I own a pair of RL Lindrick boots, where the stitching is only about a quarter inch or so, and there are numerous reports of people not realizing it is there, and tearing the stitching and tongue by accident.
This outside shot shows how he ran the stitching on top of existing stitching, so that it is almost invisible. You can see the portion where the stitching is thicker. It is more noticeable in real life, but when wearing the boots, that portion is covered by the pants leg, anyway.
This is an easy fix for anyone having the same problem with their boots. Hope this is helpful.
Great. Thanks for posting. Looks good.