Having the same problem - here was the response I received:
Using Photoshow release 6 - I am only seeing eight of the thirty two photo shows I have posted !
Corel Customer Support via zendesk.com
Thu, Jun 14, 10:34 PM (12 hours ago)
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Your request (4838206) has been updated. To add additional comments, reply to this email.
Ralp V. Puno (Corel)
Jun 15, 01:31 EDT
Hello Lawrence, Thank you for contacting Corel Technical Support.
Upon further research on your case, it seems that this is a known issue with the program. This issue needs to be escalated to the engineering team for investigation. What I can do for you is to transfer your case to them so they will be notified that more customers are having the same issue.
Though they might not be able to contact you when an update or patch will be released, rest assured that they are checking on it and will update the Roxio page.
I hope you understand.
I'll take note of the things that we have tried and include it in the report that will be sent to them.