Shared Calendars are Not Visible

Shared Calendars are Not Visible

Greetings,

I have set up two personal Zoho accounts - one for myself and one for my husband.  We each have a personal calendar that is shared with each other, we also have a third shared calendar and are subscribed to the US Holidays calendar.  The only calendars that are visible are the local calendar and one of two or three shared.

I have tried the following steps to make them visible:

Disable all calendars except the one(s) not showing.
Checked permissions and share types, have tried all available share types.
I have deleted and re-subscribed to shared calendars.

So what am I missing?  Is it only possible to view one shared or subscribed calendar at a time?  All calendars are within Zoho, there are no external subscribed calendars.

Thanks for any and all helpful replies.

Peace,
Gail