Hello @user89899 ,
Regarding the first point, at this time the Automation Path doesn't have a setting for specifying delivery days of the week or times of day. Automations currently are set to send out around 10am Eastern US Time for non-hour time delays. APBs can have up to 50 steps, which do include the delays and conditional splits. Therefore the technical maximum number of emails in an APB would be 25. To have 30 steps would require an additional APB being setup to trigger after X number of days.
For your second point, "when a contact joins a list" triggers, this will occur from the following:
Is manually added to a different list - This happens if you remove a contact from one list and add them to a new or existing list, or if you leave your contact on a list and add them to another list.
Updates their profile - This happens when a contact clicks the "Update Profile" link in an email footer and chooses to be part of a different list that they weren't already a part of.
Is automatically added to a new ecommerce list - This happens when a customer engages with your ecommerce store and their status changes because of their shopping activity. When your contacts are next synced through the ecommerce integration, they're moved to a different list based on that activity.
This will also occur for sign up form additions, however this will not trigger from you manually re-adding a contact to a list they're already in, nor for a contact signing up for the same list they're already in.
Another thing to keep in mind is that different plan types allow for different amounts of customization and available triggers. Make sure you're subscribing for a plan that works for your needs. I'd recommend the following articles for setting up your automation paths:
Getting started with the Automation Path Builder
Create your own custom path in the Automation Path Builder
Message new or existing list members using the Automation Path Builder
Understanding triggers in the Automation Path Builder
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