Just some new speculation on my part, but I was looking at the way that all of the marks are made on both sides of the blade, and something new came to mind.
It looks like "all" the makings on this knife were made by one person.
I have seen photos of older HI markings, and though most seem to have a pretty neatly done Devangari script HI company marking, the Kami markings seem to oftentimes look more on the crude side of things.
On my knife though, all the markings "seem" to be done by just the one person, and the markings "all" look pretty neatly done.
My guess.....
What "if" for the purpose of having the markings consistantly look more visually appealing, the decision was made to have the same guy(s) that normally do the HI Devangari blade markings, now do all of the markings? If this decision were to have been made, I could see where the guy doing this marking could have, by mistake, started marking this particular blade with Sher's mark (thinking it was his), and then either realized, or was told that it was not Sher's, but Bura's. He would then go on to correct his mistake by completing the marking correctly (while of course leaving the trace of his original mistake).
Just a thought, which may or may not hold water.