Hi Snowman
If you liked the way your kite flew on the old lines just do what I say and it will be all good.
I can't explain why the new lineset is like that, but I have seen uneven lines in linesets before, at least you don't have just one longer line or all different lengths!
Don't lose any more sleep over this, just make some pigtails, and make your new lines exactly the same realtive lengths as your old ones, connect to kite and go kiting (if you can find some wind!)
If you don't have any spare line, I will send you some to make the pigtails, contact me at sydney(at)kitepower.com.au with a postal address and I will send you some.
Cya and
Goodwinds
Steve McCormack