tabetha

I went to put on some rear braided hoses I had in the garage, got the one on nearest the calipers, but the other one fits one end(caliper end) but other end on car rigid line is different thread!!
I can't believe it, this is not normal surely ?
Both sides of the car were the same, so had to put (rubber)flexy back on each side, anyone come across this before ?
It is not damaged threads or anything they ARE different as tried my brake parts from box in the ends.
It is NOT the end of the braided flexy that is different as each end of each pipe fits all others.
Help,
Thanks
tabetha