If you use those links in a Custom Channel (i.e. create your own playlist using those entries), does it not work in Channels?
It has been stated many times before, the 500 item limit for playlists is performance related, as has been shown to cause issues. If you wish to utilize all 1000+ entries, there are services that can the playlist for you or shorten it; or you could curate it yourself and remove unnecessary entries.
Was a new thread necessary to beat this same dead horse?
