Has the quantity freeze for Nifty reduced from 10,000 to 7500?

I already had problems having to place multiple orders for getting my options orders executed. Has the quantity freeze further reduced? This is such a pain.

Yes - NF reduced to 7500 and BNF reduced to 2500

Please have a look at this link.

www.nseindia.com/content/fo/qtyfreeze.xls

Deos this mean we can not trade more than 300lots of Nifty options or 100 lots of BNF in a single order? or it is restricted to trading this this qty per trader ???

That is for single order.
You can place orders one by one for each order limiting to qty freeze value.
Only your number of orders would increase, no other restrcitions.