Nuvi (zumo here) doesn't display it because FullCXEU-2014.10, FID 2969 has the same FID than Roma 2014.10, that is 2969 too.
Mapping data come from the same City Navigator NT version and cant have different FIDS, onlY MMR part FID 800 has changed.
Code:
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Nuvi cant discern maps having the same FID and displays just one of them in list.
Note: I'd even disable in list all the maps (you're not using)in maps list covering the same area, It can create problems in nuvi.