Help please embedding a calendar

Help please embedding a calendar

I am new to Zoho Calendar and trying to get it to properly display a created calendar in a website. I've read the documentation and created a calendar with 4 different calendars contained. It displays properly when the embedding code is displayed and I select PREVIEW - see image 1. However, once the embed code is copied and pasted into a page and uploaded, it will not display any of the other calendars (even though all are highlighted) - see image 2.

The embed code is:
<iframe src="https://calendar.zoho.com/embed/2ecd34d6cbe621d1278c94b18e0f260b054f1a16a2919804991ae9a1762da4864a64100d17cdc3bb?cal=2ecd34d6cbe621d1c299f1c5fbcca605edc2b07a2a609f00e53104c3c1cb6c644a64100d17cdc3bb,2ecd34d6cbe621d10328f8128f47f7f89b3031edaf0466752855ff0c10e47a534a64100d17cdc3bb,2ecd34d6cbe621d143bdb576315c831b2a29a66501f0257c30b4c797c00617a94a64100d17cdc3bb&title=First Baptist Westcliffe Calendar&type=2&l=en&tz=America/Denver&sh=[1,1]&c=10" width="400" height="500" frameborder="0" scrolling="no"></iframe>

I've repeatedly made sure I selected all the calendars (which is why the PREVIEW works) - seem image 3. It just doesn't work. What trick am I missing?

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