no matter how sure you are about something, it’s always best to double-check.
Yes!
This is good advice. Not only for software. Humans often make errors and are adamant that they are right, not even allowing for the possibility to be in error. Or they tell intentional lies and deceive people. Very popular in politics. But software can have very obscure bugs, especially if you take things for granted. Like how a float is handled. Or mtu in networks.
For this problem, as far as I know there are data servers with load balancing. It could be possible that the host serving the game was not updated fast enough. Or the isp is using a proxy.
There was no time frame given, how fast the update was checked, and if this would resolve by itself after a while.