I don't think you are a too high of a level. Being 2-5 levels ahead of someone doesn't mean they are too high and should not be in the area, this just means you might have practiced more, or did some minor quest. The only time i think people are too high for an area, is when i see level 50-100 wizards in unicorn way.
With the additions of Wysteria, and especially Wintertusk, it's now possible to be well over L50 in DS; however, pre-Celestia, it was normal to reach DS at 45, give or take a level, and finish DS at L50.
Don't feel bad about being 49 in DS. I have Fire who is 52 and still at the very beginning of Mooshu. She's unusual though; she's been around for years; she's done a LOT of helping, and she has completed all the side worlds.