3:32 pm local Overfilled CP3 by doubling LLCV to 34%. Took 18 min. to see vapor and tiny amounts of LN2 out the exhaust line. TCs responded but still did not readout high negative #s like I'd expect or saw with 1/2 turn on bypass fill valve. So I left LLCV at 35% for an additional 7 min. but did not see a drastic change in temps. Never saw much flow out of the bypass exhaust pipe. Bumped LLCV nominal from 17% to 18% open.