The renown with the faction works this way: As soon as you advance a reputation level with one of the generals, you gain renown with The Severed Threads. The problem is, when you had two or more accounts logged in, this reputation somehow doubled. Most of the time, it wasn’t about knowing or not knowing; you just played, and the reputation would increase. In WoW, speaking from nearly 20 years of experience, there are factions where your reputation can rise exponentially without bug or exploit. Until then, I thought it was normal for mine to be “high”, especially since I wasn’t at reputation level 25, but “only” at level 14, killing all rare mobs, completing all world quests and all side quests. The warband launched with several bugs, including this one, which did not affect renown with other factions. According to reports from people who only have logged alts from a second account to check the auction house, it was not necessary to form a pact with more than one general for the bug to occur; simply not having a pact with a general was enough to trigger the bug.
When comparing with the reputation of some friends on Sunday, mine was literally twice as advanced, during the early access. In other words, my unintentional gain was 7 levels of reputation, and I was banned with reputation level 23 (at that point, it was already possible to reach levels 16-17 without intentionally or unintentionally exploiting the bug).
The bug was fixed on Monday without any mention of it, meaning that the bug could no longer be exploited (people with multiboxes could no longer gain double reputation for each advancement with a general). There has still been no comment from Blizzard about the situation, and we want to understand the reason for our ban and whether people with two or more accounts logged in simultaneously will be affected from now on.
What happened was indeed a bug. People from large guilds did exploit the bug, and this would be considered an exploit. People who wouldn’t benefit from the reputation gain (after all, most rewards are cosmetic, for casual players) were also banned simply for having two accounts logged in at the same time.
EDIT:
If I may summarize what triggered the bug: 1[multiplied by]x reputation level per general (you gain reputation with other generals regardless of the chosen pact) = 1[multiplied by]x reputation. Here, x is the number of characters logged in simultaneously across multiple accounts on the same Battle.net. Since there are people who multibox without using programs and those who are 100% logged in with two accounts at the same time, the reputation doubled in a way that didn’t seem like a bug, given that the renown gain was not directly tied to reputation with The Severed Threads. Instead, it was tied to the generals. This made it more difficult to understand the reputation gains.