difficulty in climbing a model

[doking]

I have a model made in scale 1:1 consisting of solids, surfaces and trees, people and some other things made in surfaces, of course some are blocks, when I try to climb everything to get a model in scale 1000:1 everything explodes, some surface takes on an inverosimile shape, the trees are positioned in a decomposed way as if they climbed each one for themselves without respecting the original placement.
How come all this happens and how can I solve it? Thanks

 

[lattu]

can you attach the file to better understand?

 

[Tristan]

Are the blocks random?

 

[doking]

Are the blocks random?

in property, in various, in the annotative voice I read no