I don't really know where to put this, so I'll leave it in this category.
Twice in the past few months I've started up my game after a while of not playing to find my username changed. The first time when my name was changed, it was to "Necluse", so I changed it back. I looked up my ID on the RTB ID lookup system (my ID's 12645) and didn't find any evidence of a name change when I myself wasn't using the account, in fact the name change was logged as being made the second I started up Blockland. I brushed it off as a simple technical hiccup and played for a good few weeks before I stopped again.
The second time was just a few minutes ago, I started up Blockland and my name was changed to an insult (something like "richardless wad", real offensive there nsfw 18+). I immediately got concerned and headed to the RTB site to look up my ID, but apparently the timing couldn't be worse and the RTB site and its tools are down.
Though there doesn't seem to be any evidence of someone impersonating as me or whatever, I'm getting worried that someone (who I guess doesn't like me very much) has my authentication key. I want to know if this is really just a glitch and I'm just overreacting or if someone does have access to my account for some reason.