Cutting the buds won't stop it from flowering. Are they getting enough sunlight during these 14 hours? A few of my outdoor clones were getting very little sun a while ago, and they began flowering even though they shouldn't based on the light cycle. Either way, as the northern hemisphere moves closer to summer, your plants should naturally re-veg and start growing very twisted and strange leaves, but that's temporary and eventually they'll grow normal leaves again. The upside to this is that, during the flowering period, plants will branch out a lot, so once it re-veges you would have a very bushy plant which could be heavily defoliated in order to increase its bud sites even further in preparation for its next flowering period.