Are you sure you actually had 457 and not 357?

Since you start a rank at 0, and you can get at most 51 rep points a day total (3x10, 3x7), 357 would mean exactly 7 days of collecting rep points, and the one you did now brought you correctly to 408.

To get to 457, you'd have to pick up 5 rep point quests instead of the 7 and 10.

So, did you only do 7 and 10 point quests or also 5 point quests on this rank?