Here’s a fix for the translation key:
https://github.com/discourse/discourse/commit/9005afbe49e3838f8883a031ee9dcfb76dfc94c7
We actually discussed this at length internally before developing the feature, and the conclusion we came to was that it was the only sane way of handling things.
Consider you read a topic with 100 posts. At 80 posts in there was a pending post you did not see. After you finished reading the topic, a moderator approved that post. Logically, would you want the next time you entered the topic to jump you to post 80? I think that would confuse many more people than putting it at the end.