Whether they're high or not, they're what you have; you can't lose levels. They're certainly good enough for where you are. Go on about your business in Dragonspyre.
Is lvl 49 to low or to high I am on the third street now the grand chasm and i am now lvl 51 is that too high also
It doesn't matter what level you are. Honestly, it will be easier for you at a higher level. I went in to fight Malestaire at level 48 and it was not easy - at all. :-)
That is extremely high, I finished Dragonspyre at level 46 or 47. I had to do a bunch of crappy side quests so I could be sufficient level ( 48 ) to start Celestia XD.
However, you are NOT too high of a level. I think that there is a too low (for example, my friend started it at level 40 and kept dying) but there is no such thing as too high. It only means you will have an easier time moving through Dragonspyre, and you'll be able to call for friends less than I had to.