Orthigonality issues while reading mesh
 

I am meshing 2D file through ansys meshing tool. The geometry is axis symetric. I modeled only half and given one axis as axis through named selection. When i transfer my mesh file from ansys meshing to Fluent and report the quality it says min orthi qual 0.8 which is fine and good for me. Simultaneously it gives warning to change my mesh to symmetry or wall as against planer which is a default option..Now when i again check the quality it says min ortho quality of the order of 1e-20. Can anybody explain why is this occuring. https://www.dropbox.com/sh/0oxd79vwf6nsly0/CtkIa4vU6R