I'm going to really have to defer answering your question to kasi - I have very similar behavior and attaching the snapshot I gave support.
I solved seeing "call grandma" and "pickup stamps" in parallel in the context view by making them separate projects.
I think I have a fundamental misunderstanding of what you mean by "parallel actions" when what I want is parallel projects and parallel sub-projects.
a reminder i'm okay with using folders at the structure for parallelism for now. this workaround is not as cumbersome as the
traceability of day-specific next actions to projects thread.