Hi sorry you have had an issue.
But, the lines supplied are the same length as standard just with a mk4 type fitting on the end.
They just replace the last section if flexi hose, from the caliper to the first join.
Plenty of others have fitted them and commented on how well the rears fit and the quality including John Mitchell racing, they even feature in Riley write up which is on the volksdevile site and linked to a number of others.