Adding and ordering/Positioning fields on Fluid Approvals page

Hi,

We have a requirement where we need to add business purpose (Field name: BUSINESS_PURPOSE, Record Name: ps_ex_sheet_hdr) field to fluid Approvals page (Page Name:EOAWMA_MAIN_FL).

We were able to achieve it via page composer but the issue which we are facing is that we are not able to order/position it as per our requirement on our page, it is only getting placed at the last.

Also, One more thing which we want to achieve is to add another field (Field: Descr, Record: PS_EX_PURPOSE_TBL) of a record (which is not currently present) on the page.