Problem with PF settlement

Hi Lawyer Club friends,

I worked for an IT MNC and left the job in october 2007.The

company has settled my provident fund and the company's

agent(chartered account) has sent me the settlement cheque.What I

have observed later is that the interest earned is meagre compare to the

principal amount that was deducted on montly basis from july 2004

till october 2007. I like to know whether there is any way to

know the interest amount earned from the july2004 till october

2007 is correct or not.Since the interest earned is very low, I

guess there might be some error/faud committed(consciously or

unconsciously) by the parties(company/PF dept/company's agent)

and is there is any way to know it how ?
The agent has deducted 30% at source pus surcharge(3%) , is this

is correct/legal?

The PF and other details as below

from 12/7/2004 till 19/10/2008
Contribution from employee : 145880
Interest earned @8.5 % : 1276

Contribution from company : 171717
Interest earned @8.5 % :1507

Total contribution : 317597
Total interest earned : 2783

Gross amount to be settled : 320380

Tax deducted : 96114
Edu. cess    : 2883
Total tax : 98997

Also I like to know why there is difference of contribution money from the employer side which is on lower side compare to my contribution ?

Thanks
Josh