I cut the map in two pieces in an attempt to avoid that "zoom too much problem" , maybe you just saved the upper part?
good idea lostatsea i'll try to post that in the bug section if my next map still have zoom issues, thanks!
And a few details about the map, realised in photoshop except the labels made with illustrator. What kind of app do you use for labelling? because PS isn't really good at it..