i entered my world in which i have spend months building a village/small town and found that most of the structures have split and ended up in various parts of the area. Please help, i've worked hard on this project and would appreciate it of you could help me out ASAP! 

i have attached 3 images as examples as to what i am concerned about:

image 1- a block of apartments that have somehow been dismantled due to this bug

image 2- a church with some of its outer walls missing

image 3- a road and a set of houses that have seen better days

NOTE: i build all this in peaceful creative mode so there is no mob griefing involved

thank you so much for your help, i'ts highly appreciated