Variance In Taste from the same box

I was wondering if any of you have had this happen, I am sure since I have only been smoking regular for about a year or a little less now. 5 Vegas A series is what I call my everyday stick I enjoy them alot and for the price I can't beat it. So anyway I have had about 5 sticks out of this box and all have been great in taste and burn. I smoked one earlier today and it was great, then I smoked one after dinner and man it was bad, poor draw, bitter, just all around bad I had to put it out at half way. Can anyone shed some light on this for me? Thanks
Josh