Hello,
bobsalot, are you certain that the difficulty has not been lowered? Is the interface displaying that the difficulty has not been lowered, or some other bug? The difficulty should automatically decrease with the new server you are on with increased number of players that have beaten it.
Thank you!

OK, Yes, I do see now that is definitely in error. I will submit this bug to the developers for you!
EDIT: You've censored out the names on your screenshot, which makes this process more difficult. Can you tell me if the players that beat the ninja exam are from your original server or not from your server?

And how many times have people from server S1325 beaten ninja exam 125?

Alright, that's what I suspected. It looks like you're pulling data from your host server, and other servers aren't being taken into account. I'll forward all this information to the devs. For future reference, it's best if you include all relevant screenshots (scroll all the way up on the Ninja Exam 125 screen shot, for example, to show all players involved) and don't censor out information so we can figure this out more quickly.

Thanks so much for the quick responses and for your patience in this matter! I'll contact you if I here anything more regarding this, and feel free to message again if you have any more questions!