Groan.....oh dear, the Chevrons are HSTs Tartan and my foray into trying to coax one of them apart and then back together was about as much fun as a trip to the dentist!
feline fanatic, my two whites were 2 totally different lots/brands, (insert quiet weeping and hand wringing here please!). I just happened to have some leftover squares from a previous quilt cut and got them mixed up with this lot. Ha.....and I wondered the other day why I had so many white squares left over after I had made all my chevrons...was sure I hadn't "over purchased" my quantity. Derrrrr....the penny drops now!!!!!
Meanwhile, it is a new day here across the sea and I am up at a ridiculous early hour making DH breakfast after only a couple of hours sleep. But, I now have my new chevrons cut out and half of them sewn together so once DH is off to work I can sit down and start re-sewing my rows...again! Thanks to everyone for the advice.