Retaining styles Copy and Paste JSX Scripting INDESIGN

Hello 

Please may someone inform me if scripting using JSX for InDesign allows for the copy and pasting of the formatt of text. 

For example I have made a script which can break a single text frame devided into many equal separate text columns (as adobe are super poor at giving usful tools) - but when the text appears in the separate threaded boxes the formattting is gone 

the script replaces the single text frame box with separate text frame boxes and pastes back in the text 

but i cannot make it paste with the og formatting - interesting only justfication will be pasted as it is not a character format etc

also i have made a script where a user can just select unthreaded boxes and it will auto thread

but again for some reason formatting is losst and altered even though no copy paste funtion should be happening 

any ideas why it is so difficult thanks