1. I'm pretty sure I'm the one who wrote the petira date. Where did I get the information
from? I'm not sure. So problem 1 could simply be: I wrote the wrong date.
2. Perhaps it was written somewhere in Julian date and I translated that to the Hebrew date but in reality it was in the evening, so the Petira was one day later? In that case there is an option that the Kvura was a day later as listed on the Matzeiva but the Yuhrzeit was remembered as the Petira. Which is a second possible end to the discrepencies.
3. The matzeiva inscription leavs no room for mistake. It's the correct Chaya .Written in the typical Hassidic way without the final Heh. (as in the printed seforim of the time: Divras Shlomo and Maase Rokeach, and the Korczyner's seforim. )
Only our family write Hamagid MiSkohl for Reb Shlomo Lutzker
And the two others Hagoone Hkodosh the Belzer and Hagoon Hamefursim the Kortchiner.
https://www.geni.com/images/missing_image.png
So we can rule out the chance that it's a different Haya, which potentially would have ended the discrpencies.
4. There is always the chance that my fetter Shulem O"H ZT"L had simply had a mistake. It was ALMOST erev RH. I wonder if fetter Yisroel kept the day and remembered it, and if anybody in the family knows anything.
5. There is always the chance that he went missing after the war and in Ador II 5779 they did not know his fate. There was a war raging till the Ukrainian collapse in June 1919, and she was niftar in March 30 1919. See here: https://en.wikipedia.org/wiki/Polish%E2%80%93Ukrainian_War
Lviv was at the center of this, being the capital of Galicia, and in fact the attacks against the Jews in which he was shot and later died (in a hospital? who was with him?
how do we know his fate?) were directly related to that war.
A month and a half after her Petira the Polish offensive towards Lvov which then was called Lviv under the Ukrainians, began with the blue army of Renault tanks. At the time she was niftar there was no way to get from the polish front to Lvov.
So it is not far-fetched that they had heard from him before he was wounded, and then had to assume everything was ok.
6. Aba, could you take a look into the Kortchiner Halila Depischa. Perhaps the date was taken (by me?) from there...