Source 1 just says that they incorrectly reported multiple days of tests as one day. Not cool or good, but there’s a reason why experts look at things like week-long trends and rolling averages. If they lumped 4-5 days into one, that day would have a higher number, but surrounding days would be lower, resulting in essentially the same rolling average. The “only” truly negative outcome from this would me public panic over a crazy 1-day spike. Actually policy should not be based on any single day data point, and no expert is doing that, only politicians and the general public who have no knowledge of how statistics work.
Second link talks about not reporting negative test results. Again, no bueno, but that doesn’t impact the total confirmed case or the death rate, as a negative case is neither the numerator nor denominator in any fraction at play here.
Source 3 sounds like the same problem as 2 of not reporting negatives, which means all reported data are positive, which is stupid as all hell, but doesn’t change the number of total positive cases.
Yes, it’s horrible practice, and it creates a rift between the data and the people, and breaks their trust and undermines their credibility to a degree, if none of those actually come close to suggesting that the TOTAL number of cases is wrong.
I hope that makes sense.