Determine column order when using ColReorder

I am using DataTables with Ajax. I am using the ColReorder extension and everything works, including the Ajax calls. However, when I reorder a column and then click next page or search, columns do not preserve new order.

I look at request sent to server and I cannot see any changes that would indicate a new column order:

"draw"=>"3", 
"columns"=>{

"0"=>{"data"=>"0", "name"=>"", "searchable"=>"true", "orderable"=>"false", "search"=>{"value"=>"", "regex"=>"false"}}, 
"1"=>{"data"=>"1", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"2"=>{"data"=>"2", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"3"=>{"data"=>"3", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"4"=>{"data"=>"4", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"5"=>{"data"=>"5", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"6"=>{"data"=>"6", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"7"=>{"data"=>"7", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"8"=>{"data"=>"8", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"9"=>{"data"=>"9", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"10"=>{"data"=>"10", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}

}, 

The above params look no different from the ones below, even though I rearranged columns between the request:

 Parameters: {"classification_code_id_is"=>"5cad0dc73ed1496086000007", 
"draw"=>"4", 
"columns"=>{
"0"=>{"data"=>"0", "name"=>"", "searchable"=>"true", "orderable"=>"false", "search"=>{"value"=>"", "regex"=>"false"}}, 
"1"=>{"data"=>"1", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"2"=>{"data"=>"2", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"3"=>{"data"=>"3", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"4"=>{"data"=>"4", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"5"=>{"data"=>"5", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"6"=>{"data"=>"6", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"7"=>{"data"=>"7", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"8"=>{"data"=>"8", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"9"=>{"data"=>"9", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}, 
"10"=>{"data"=>"10", "name"=>"", "searchable"=>"true", "orderable"=>"true", "search"=>{"value"=>"", "regex"=>"false"}}
}, 

"order"=>{"0"=>{"column"=>"8", "dir"=>"desc"}}, 
"start"=>"10", "length"=>"10", "search"=>{"value"=>"", "regex"=>"false"}, "_"=>"1555023437295"}

How can I determine the new order?