OK. It looks quite complicated! I've not got my head around it yet.
Maybe it would help me if you can you say, in words, what the results intend to show, and perhaps, for a bit of context, what this data represents in the real world.
And maybe take one row (say row 13, index 12) and say what has happened on/by each of the 3 dates?
I'm guessing these dates might be the date by which 50%, 90% and 100% of the lengths (of pipe?, railway?) were completed?
Anyway, another guess, but the results are different from yours:
2022-11-27_135920.png