Entering with the Imam in the final tashahhud, then the Imam prostrating for forgetfulness

The questioner : Peace be upon you.

The Shaykh : Peace be upon you.

The questioner : Shaykh. Yes. I came in just before the 'Asr prayer. The 'Asr prayer. Yes. I joined the Imam in the fourth rak'ah. Yes. He sat for the final tashahhud. Yes. He stood up. Or he performed a sitting after the final tashahhud. Huh? He did a sitting after the final tashahhud. He did the sitting, and I did not notice him standing up; I considered him to be rising for the second or third rak'ah.

The Shaykh : Yes.

The questioner : After he finished, I went back a second time, followed the Imam, and completed my prayer, and I performed two prostrations for forgetfulness. Did I follow the correct course?

The Shaykh : Yes, you say you entered with the Imam in the final tashahhud.

The questioner : Yes, that is right.

The Shaykh : And then the Imam stood up, I thought the Imam stood up yesterday.

The questioner : I thought he stood up today for the previous one.

The Shaykh : I am a servant.

The questioner : And he sat for his prostration. And after he finished?

The Shaykh : And after I understood, I went back with the Imam.

The questioner : I went back to the Imam.

The Shaykh : Then I stood up to complete your prayer.

The questioner : How many connections did I have, and I performed two prostrations for forgetfulness.

The Shaykh : Yes, there is nothing else.

The presenter : May Allah reward you with good, O Shaykh.

The Shaykh : This is a house.