First of all, welcome to our new user community, @taw_moto!
With regards to your concern, we’ve checked the official feed of the “Security in Five” podcast - i.e. http://securityinfive.libsyn.com/rss, and confirmed it only displays the 100 latest episodes. We’re thinking Castbox may have an unofficial feed indexed in their catalog. We don’t recommend this though as the feed may not be authorized by the publisher. Nevertheless, as a suggestion, you may consider contacting the publisher about it, and in case, they have another official feed that displays all the episodes, we can definitely add it on Player FM and make it available for everyone (provided it’s a public feed).
For your concern on image uploading, did you mean uploading a photo on this community?