If you are using SW2014 then you can use /try the option of replace sketch (where you can replace the old sketch entities with new one and still keep the relation)
If not then edit the sketch, convert old sketch to construction, add the new splines to complete the sketch. Finally edit lift and pick those new splines.
I feel kinda dumb. Maybe just lazy.
I rolled back my feature manager to sketch3,
created a new sketch resembing sketch3 (without relationships),
rolled forward to sketch4,
created a new sketch resembling sketch4 (without relationships),
edited the existing loft,
cleared the list of sections,
picked sketches from 1 to 14 using the two new sketches instead of 3 and 4,
edited the new sketches to have relationships from sketches 3 and 4.
Thanks for the help
No need for clearing the full list. Just remove the old 3 & 4. Pick the new move and move them to required position.