The parish of Bellie has a convoluted history. It was long divided between the counties of Moray and Banff, but to complicate matters further, in 1835, it and Rathven (its Banffshire neighbour to the east) were, in effect, colonised by the new "quoad sacra" parish of Enzie (which belonged to Banffshire). Enzie had its own OPRs from 1835, became a civil Registration District in 1855 and has its own Enumeration Districts (as part of Banffshire) in the Census from 1861 onwards. At the time of the great reform of parish and county boundaries in 1891, Enzie is not mentioned, but that part of its territory which originally belonged to the Banffshire part of Bellie was transferred to the County of Moray - but Enzie continued in existence, within its existing boundaries, as a Registration District, and with its own Census EDs until 1936! If you think this does not make much sense, then join the Club.
To complicate matters further, it appears (from an analysis of Census placenames) that the boundary between Bellie (BAN) and Bellie (MOR) was not the same as the boundary between Bellie and Enzie - but this cannot be totally verified, as no map showing the administrative boundaries of Enzie has so far come to light.
Against this background, it is difficult to give hard and fast advice as to the genealogical implications. The best recommendation is probably that, if you have ancestors belonging to any of the places listed below under "Names, Geographical", you should be prepared to search for them in the records for both Moray and Banffshire, and in the parishes of Bellie, Enzie and Rathven.