if the secondary vine began to climb later than the main one, this is normal. they will try to produce cones no matter when they were trained. unfortunately, the later vines may not have time to develop a usable cone. you gotta give them credit for trying though. also, even if they don't have a chance to fully develop, you're still getting a ton of carbohydrates sent back to the crown for energy in the next growing season. this kinda goes back to folks recommending cutting back the new growth early, and then selecting a few choice vines to train to bear the main harvest. once they get established you'll have more vines than you know what to do with and if you keep letting the stragglers climb, you'll end up with a mish-mash of ripe and immature cones which makes harvest a real chore. get hoppin'!