Shoe sizes

I have been looking for new toughees school shoes high ankle boots for my little boy for days Now. First I got a pair at Ackerman's Boulders Mall but the sizes were mixed up, left shoe was size 7 and right was size 8. Thought it was a customer who mixed up the sizes. Then went to Edgar's Mall of Africa same story, Left size 7 and right size 6.... OK thought again customer mixed them up.. Now my little sister went on to buy same shoes at Edars East Rand Size 7 and 6.. Now think about it, 3 different shops in 3 different places having the same problem.. Toughees makers/suppliers must real look into this issue.. This is sooooo FRUSTRATING FOR REAL.