I think different matters abe being mixed up, causing you a lot of confusion.
The law requires the employer to pay his share of of contribution of 12% plus administration charges on the actual salary subject to a salary ceiling of rs. 6500 per month.
Where the salary exceeds 6500 per month, the PF contribution will be computed as if the salary is rs. 6500 per month.
(Here salary means basic + da only)
If an employee joins the employment at a salary of more than 6500 (joining salary), and does not have a previous active PF account, then the employee has an option of intimating to the employer that he wishes to be exempt from PF. Only in such cases, the employer is exempt from his contribution. In all other cases, he has to pay the same.