Mvat query

Dear expert, i know that late filling of mvat return will cause 2000 penalty if filed within a 30 days from due date n 5000 in other cases. but if i pay 2000 by challan for mvat return penalty whthr same is applicable for cst also ? if not then do i need to pay 2000 more for cst if mvat n cst are both file after due date on same day?