Sandwich Policy - If leaves are approved on Fridays or Mondays - Saturdays & Sundays will be counted?

Hi, Please answer my query.

Our employees has taken 11th Aug (as RH-Thursday) , 12th Aug (approved by Team Manager-Friday), there is salary deduction for 13th Aug 2022.
Is this viable ?
Can you please elaborate on what the sandwich policy says?
If leaves are approved on Fridays or Mondays - Saturdays & Sundays will be counted?

Sandwiching will happen only when both the ends or prefix and suffix of a holiday are leave. That is if you are present on Monday, no way the holidays will be counted as leaves.

The approval of the leaves depends on the company policy. If the holidays/weekend are falling between the leaves taken the actual leave will be considered excluding the holidays/weekend or may follow as continuation of leave irrespective of the holidays/weekend

As I understand sandwich leave is the employer's practice of counting the holiday also as leave if it is preceded or followed by any leave applied for by the employee.
Whether such a leave policy is right or wrong is a different question for any answer in this regard would be a nuanced one.
The main purpose of such a policy is to discourage employees to avail longer period of authorized absence inclusive of the weekly holidays in the interest of the organization's work both in the beginning and at the end of the week.
The negative impact of such a policy is that it curtails the right of the employee to club his usual holidays with the leave applied for even on occasions of genuine urgency.
Thus it is just a preventive check.

If you follow the annual leave with wages/ Earned leave as per Factories Act, the holidays and weekly offs in between two such leaves should not be counted as leaves.

Employee is contributing on the actual PF wages and applied for the online transfer. The claim was rejected asking to submit joint declaration under para 26(6) for higher wages contribution.

Can you please suggest