Max of 50 items display in many collections for many iTunes U schools

An increasing number of iTunes U collections will not display more than 50 items - this seems to be the case for many schools - I also noted in a PBS list today, they were maxed out at 50 episodes in their Nature display - https://itunes.apple.com/us/podcast/nature-pbs/id203180821?mt=2 - I have some e-mail responses from Apple with no end user solution so I take it that we are not overlooking a button or anything that will help display the remainder of the episodes. My gut hunch is that podcasts/collections that historically had a customized theme are now limited to display of the first 50 items - although the old customized themes were dropped and I can't be certain of this.

Yale - American Revolution - for example, this collection has the plain background and displays 55 episodes. https://itunes.apple.com/us/course/american-revolution/id495056024

Boston College - Literature - limited to 50 episodes - grey background (formerly a customized theme?) - https://itunes.apple.com/us/itunes-u/literature-art-cultural-studies/id400532483 ?mt=10

Well - maybe not - here is a collection from Stanford limited to 50 episodes with the white background - https://itunes.apple.com/us/itunes-u/continuing-studies-public/id385643787?mt=10

Oxford - Building a business - limited to 50 episode display - https://itunes.apple.com/us/itunes-u/building-a-business/id381702699?mt=10

Some of our professors report that their collections alter between the limited 50 item display and the actual (higher) number in the collection - as they move from machine to machine - but we have not been able to replicate this - for example - https://itunes.apple.com/us/itunes-u/histology-podcasts/id384931290?mt=10

Stanford - some of Stanford's collections show the grey background - https://itunes.apple.com/us/itunes-u/how-i-write/id385404247?mt=10 for example - and appear to be limited to a 50 item display.

Harvard - most of Harvard's collections are OK but not all - https://itunes.apple.com/us/itunes-u/science-and-cooking/id399227991?mt=10 - maybe it is just older collections that are affected by the 50 episode display limit.

I keep hoping we are missing something very simple - anyone else getting complaints yet?