I have sold lots of seed in the pass and have had some of the same complaints. We tried to make every buyer happy just like you guys even tho there is no guarantee a seed will germinate. We who plant lots of seed every year know that seeds are always a gamble and would never complain to a seller that his seed did not come up, he or she has no control over mother nature. Most of the complaints will be from buyers who have very little experience with seed and are expecting a Stout Medal winner from the $10 they spent. One thing I would never do is tell someone I would make the same cross next year and send them some more seed, thats just way beyond the call of duty, but thats just me. Knowing me I want even have those same two daylilies a year from now and at this time in my life I can't remember what I did yesterday.
Sell those seed, you can't make every happy.