It seems as though the suggestion of issuing a ticket per lottery has been taken up. Unfortunately, they are not applying it to people who attended lotteries before phase 18, but at least they have acknowledged that the original scheme was unfair. Here’s the new text from the sales procedures that describes this new rule:
Commencing with phase 18 any prospective purchaser who participates in multiple sales selection events will be given an extra ticket for each event (after phase 18) in which they have participated and not had their name drawn. Once you have had an opportunity to be selected for a home at Bayport Alameda you will not be given multiple tickets for future sales selection events if your name is drawn and you pass or select a home and later cancel.
Thanks to “passing through” for mentioning that they had changed the rules.