W510, newest driver released in 7 Oct is still buggy. 4.95.48

Question

The new SmartAudio is still weird, compared to an old version, can anyone clear my doubts? Thanks in advance.
Under the Volume Mixer
If Classic Mode was selected in Audio Director, it will have options to adjust volume for speaker/headphone and microphone.
If Multi-Stream Mode was selected in Audio Director, it will have options to adjust volume for speaker, headphone, docking, external and internal microphone.
Is this normal?
Under the Audio Director
I would like to know how does Classic or Multi-Stream mode works. As for my W510, if I choose Multi-Stream, the headphone bass will be stronger and music will be louder, but the onboard speaker will not produce any sound, not even with different sound. Is the audio director feature-set available in W510, Conexant HD20585? If not, why is this audio director feature-set is in SmartAudio in the 1st place?
Source cited from: sound from the laptop speakers -and- headphones at the same time 
http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/How-to-get-sound-from-the-laptop-speakers-a... 
Under the SmartEQ/3D Settings
First Problem
If the 31Hz is set to high/max, the sound and the bass will be softer, but if the 31Hz is set to minimum, the sound and the bass will be louder and deeper. (It seems like the range was reverse, higher is weaker, lower is stronger) Tested on Sennheiser HD202, onboard speaker would not be affected as it will not produce such a low freq, but affect headphones as the frequency range will be much wider.
Second Problem
If the 62Hz or 125Hz is set to high/max, the bass greatly increased, but the overall sound will be much softer and you have to increase the main volume to compensate it. From what I used, Hi-fi EQ or other computers EQ, increase the low frequency does not make the overall sound softer. (Affect both headphones and onboard speaker)
Third Problem
Phantom Speaker and 3D Immersion works for speaker in Custom EQ only, select Phantom Speaker or 3D Immersion mode in Off EQ or Preloaded (Jazz, ....) EQ, it will automatically be switched to Custom EQ. But a T400 allow you to use Phantom Speaker or 3D Immersion in Off or Preloaded EQ mode without automatically being switched to Custom EQ.
Fourth Problem
Click on the Enable Night Mode will create a sudden spark sound (high volume) and the sound will be slightly louder for seconds. Disable Night Mode don't affect the sound. Like this, what is the night mode for?
I am an audiophile and sometimes I help people to test out their project. Is there any newer driver releasing out soon to fix the following problems?
Thanks
Peter

Answer 1

New released driver: 4.95.48.50
Listed Problem
1st problem, not resolved
2nd problem, not resolved
3rd problem, not resolved
4th problem, partially resolved, no more spark sound, but night mode seems useless, no effect at all.
New problem happen after install 4.95.48.0.
1. The volume of the left and right speakers are imbalanced, even though the settings are balanced in Control Panel. Sometimes the left speaker will be louder than the right or the right speaker will be louder than the left.
2. The right speaker produce sparking sound when it plays short notification windows sound or when a media is played. I hold the backspace button to play Windows sound to prove that it is abnormal. It may be a speaker issue causes by speaker cable damaged by system overheating or sound chip/driver issue as it has popped sound on headphone/speaker when muted button was pressed. 
3. Both speakers does not produce any sound, the sound will appear just for few second and stops after the volume was adjusted, it makes the sound unusable. Intermittent problem. (So far not encountered in 4.95.48.50)
Best Regards
Peter