Something doesn't sit well with me with your description but I think there may be just simple translation issues between your practitioner and yourself. What stands out is that it is difficult to treat both the yin and yang at the same time and usually if you are trying to do that you do not have a clear diagnosis. In other words, yin deficiency generally does not co-exist with yang deficiency (although it can), and even if there is a mixed pattern there is an order that you should use to treat it, instead of doing both at the same time.
For male reproductive issues we would use acupuncture as appropriate and often use the herbal formula you gui wan - in studies this formula has been shown to triple sperm volume within 3 months in most cases and positively effect other aspects (motility, etc.).
With regards to sperm volume this will fluctuate naturally and your current recommendations (no biking, no masturbation, etc.) seem good. Not too sure about the warm bath before sex recommendation - that seems like a horrible idea as it can overheat the sperm. Because of these normal fluctuations you would expect to get different readings from time to time - so do not let that get you discouraged. It is more important to watch how your husband is feeling and if any of his health issues (even if minor - everyone has some) are actually improving from the treatment. If you are not happy with treatments at this point it may be time to move on to another practitioner.
With fertility we know it takes two people (and in reality only one sperm). Because of this, you should be receiving treatment if at all possible. Endometriosis has strong links to fertility issues and even though you had surgery 2 years ago it is a condition which tends to recur (a good reason to have treatments). Even with surgery there is only a 10-20% increase in fertility according to most studies that I've seen. From a Chinese perspective there are underlying imbalances that contribute to endometriosis and these should be dealt with for the best chances at fertility. The way we look at it is if the husband has some issues (lower sperm volume, etc.) you need to be as fertile as possible - so even in the absence of strong symptoms we prefer to treat both the man and the woman in most fertility cases.
For a general synopsis of TCM views on fertility, you may want to read my article "Acupuncture for Male and Female Fertility". General recommendations for raising male sperm counts are as follows:
<li>Avoid tight undergarments and the overheating of testicles (including avoiding hot baths and hot tubs).</li>
<li>Avoid stimulants such as caffeine and other drugs such as alcohol, marijuana, and tobacco.</li>
<li>The drug cimetidine (tagamet) - often used with GERD and related issues - is linked with low sperm counts.</li>
<li>Do - exercise with moderation, eat as much whole foods as possible particularly those high in Vitamin C and A, and watch stress levels (controlling with tai chi, mediation, yoga, etc. if necessary)</li>