Why are my collection items only present on the NA server and not present on the EU server?
Like everything else, the servers do not share.
About the only thing that effects both is if you are subbing, then both have access to DLC
Tenesi Faryon of Telvanni - Dunmer Sorceress who deliberately sought sacrifice into Cold Harbor to rescue her beloved.
Hisa Ni Caemaire - Altmer Sorceress, member of the Order Draconis and Adept of the House of Dibella.
Broken Branch Toothmaul - goblin (for my goblin characters, I use either orsimer or bosmer templates) Templar, member of the Order Draconis and persistently unskilled pickpocket
Mol gro Durga - Orsimer Socerer/Battlemage who died the first time when the Nibenay Valley chapterhouse of the Order Draconis was destroyed, then went back to Cold Harbor to rescue his second/partner who was still captive. He overestimated his resistance to the hopelessness of Oblivion, about to give up, and looked up to see the golden glow of atherius surrounding a beautiful young woman who extended her hand to him and said "I can help you". He carried Fianna Kingsley out of Cold Harbor on his shoulder. He carried Alvard Stower under one arm. He also irritated the Prophet who had intended the portal for only Mol and Lyris.
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Order Draconis - well c'mon there has to be some explanation for all those dragon tattoos.
House of Dibella - If you have ever seen or read "Memoirs of a Geisha" that's just the beginning...
Nibenay Valley Chapterhouse - Where now stands only desolate ground and a dolmen there once was a thriving community supporting one of the major chapterhouses of the Order Draconis