I haven't had that problem at my LQS, but I often have had that problem with fabric I've bought at shows. Most vendors cut off whatever yardage I want with a rotary cutter or scissors, but they're in a hurry due to the lines, which I suppose is understandable.
Then there are those who take a snip and tear the fabric, leaving a ravelly edge. You know who you are. grrrrr
I bought a couple of pieces last week at my LQS which had a definite repeat and the employee took minute pains to cut it exactly evenly. Good people there.