The cross-coupled transistors TP3,TP4 & TN3,TN4 should be slightly (a few %) wider than their parallel acting counterparts TP5,TP6 & TN5,TN6 *). In your (not easily legible) Cadence layout plot it seems the other way round (at least for the upper transistors).
*) see e.g. Hans Camenzind's online book (loadable via the link given in FvM's answer from 05 Apr 2010 10:17 in **broken link removed**), Fig. 11-19, page 11-14.