That looks correct to me. There is one untranslated message and two outdated translatiosn (which are counted as translated), but shown in the "outdated" column as 1%.
Today, it still shows a total of 1:
But now there are 4 messages, 2 new, 2 outdated:
Further, if we expand MediaWiki we still get 1 for MediaWiki, 3 for MediaWiki Core, and nothing else, so the message group of the new message, Wikimedia Project Names, is not represented nor reflected in the totals:
The MediaWiki counter continues at 1, same as it has been for over a week now, doesn't increase with new/outdated messages nor decrease with translations/updates.
A user who was supposedly retired from translatewiki.net decided to come in precisely now, at this time, and from the thousands of messages requiring translation, help by translating one of the 4 messages from the MediaWiki group that I have been describing.
The counter now reads 3, instead of 1.
Did someone do anything that corrected the pt counter before that translation was made? Was anything changed or corrected?
Now, 12 hours later, the situation reported persists. LanguageStats reports 1 message for MediaWiki and 1 for MediaWiki core. Going into MediaWiki, however, there are several messages waiting for translation, not 1. It seems, at this time, that MediaWiki groups other than MediaWiki core are not being counted by LanguageStats.
I noticed that it is now apparently possible to purge the cache - that has not been possible for some time. So, I just purged LanguageStats and some people should now realise there have been 17 MediaWiki messages waiting for translation for a couple of days.
Thanks for patience. I have a hunch what could cause this and will investigate. Due to holidays, except a response next week.