Hi quick question about overpayments

Hi there,

Ok so getting a mortgage with Santander for 57k.

For overpayment they say i can make capital repayment upto 10% per year, (a minimum overpayment being £500).
ok great so i have these questions;

1. What exactly is meant by 'capital' repayment as opposed to just a normal repayment?

2. so if 10% of 57000 is 5700. Does this mean in theory I can make 11 repayments of 500 in the first year?

Thanks very much for any help :)