Moonhoney, I think the manufacturers didn't think about quilting when this function was introduced....on regular sewing it wouldn't matter as it isn't seen.
o.k. lets see if I can explain this simpler ....errrmmmm!!
1. Sew
2. Get to end
3. Press lock stitch button
4. Count the stitches 1....2....3...STOP
Leave a long enough thread for later.
THEN......
1. Start to sew new line of sewing
2. Machine will automatically FINISH off the locking stitch 1,2,3.
3. Except you are now at the beginning so locks the starting point
4. Repeat everytime you end a row!!
Tah dah!!!!!
Apart from when you initially start up sewing ALL your starts and ends will have three locked stitches instead of six!!!!
You can then just thread up the ends take a little backstitch if you feel it needs it, then bury the tails into the quilt.
NOW I have made that a little bit clearer, not so murky????? lol!!!