what is 'Sell from DP' and normal 'sell'

What does ‘Sell from DP’ normally mean and why does one get ‘credit’ from selling stocks from his/her Demat to his account.

Please refer to double entry system of accounting. It is a real account. Since both accounts cash and stock accounts are real accounts in nature, DP account is credited, (as you have received cash, (cash book is debited).

Sorry this is to cover the omission. Normal Sell is intra-day short position which is intended to be squared off.