last mile

My weight has been stabilizing around the 81/82kg level for the past 3 weeks or so. Is this normail - have I hit a wall? Slightly frustrating as it feels like all the pain without the gain. Perhaps its the diet - or to be exact not following the diet to the t.  I've settled on  a routine of working out at night... skipping to start, then dinner, then the weight exercises 1hr later.