Instand Download Option Not Showing for Customer

A customer cannot see the “Choose Your Format” dropdown to select a download. She sent me a screenshot and that section is not there on the invitation page at all.  She’s using Chrome.  On my Chrome, signed in and signed out, I can see the download option.  

Here is the screenshot she messaged me: 

Editing to Add:

Customer contacted support and they told her that “__there is a specific listing that is only digital download - so there isn’t a choose your format option on the standard invite. On some pages it allows this, on some invites it doesn’t, i would always recommend typing download after the title to make sure it brings up the option”.  

I was under the impression that all invitations could be downloaded. Even so, I know I set these invitations to download as I CAN see the option to download it on my own browser - https://www.zazzle.com/tarot_fortune_teller_celestial_baby_shower_invitation-256706919339416483. 

Now here’s the strange part - Customer support sent her to https://www.zazzle.com/tarot_fortune_teller_celestial_boy_baby_shower_invitation-256763426734710587?dip=1 
and she was happy to download this version.   I made three versions of this invitaiton - gender neutral, girl, and boy. It seems the gender neutral version (the one the customer initially wanted to order) did not get properly grouped with the other two. Why one would be unavailable to download for *some* users is confusing me.