TLDR:

Lower county level totals were published with an error coming from swapping digits in the country level grand total, showing that local numbers are calculated from the global one, instead of adding local numbers to get their sum as the only correct way.

Background:

Every communication is centralized, the published numbers are either grand totals from the beginning of the pandemic (Hungary was very lucky in the 1st wave), or just daily snapshots without explanations. Independent media queries are ignored.

Since older data gets overwritten (sometimes more than once) every day on the official page [1], people, journalists and NGOs started to archive and analyse the data for themselves [2].

Local hospital and city level data is secret, doctors were prohibited to disclose any numbers even to other doctors in other hospitals [3].

County level data is published in a hard to read picture, and the older one is deleted (despite there wouldn't be a filename collision) every day by hand.

This is not the first anomaly, we had a day when more infected people were found than the number of tests, and 2000 people (9500 vs 7500 last week, but 6440 vs 4440 a week earlier) in hospitals are still missing from the public data [4][5]. These were "explained" later, but there is no explanation to what happened on Saturday yet.