Were there any other changes you might think that may have made this happen? Did you level or increase your power significantly? Is there more new people in your bracket?

If you'll below level 70,I think it's much easier for people to move to different brackets so that might have been the reason why you see people with the same level.

Funny that you mention it, I just got moved to a lower bracket since I faced players that have power and level typically lower than I expected th*ual plus the regular winners aren't there as well. If I happen to see the new bracket again then good move OAS :)