Following the Salafi Ulama

Q: A scholar who gives a legal opinion is rewarded for it, two rewards for the one who is correct and one reward for the one who erred. Therefore we say that all imaams are on the right path and can be followed. So why can't we follow these salafi ulama?

Mutamatti Leaving Makkah after Performing Umrah and then Returning to Makkah for Hajj

Q: Zaid set out to perform Tamattu Hajj from South Africa during the months of hajj. After performing umrah, he proceeded to Madinah Munawwarah or Taa’if. When he returned to Makkah Mukarramah, he only tied the ihraam for hajj and he did not make umrah. Will his hajj be regarded as a Tamattu Hajj or will it be compulsory upon him to perform another umrah upon returning to Makkah Mukarramah for his hajj to be a Tamattu Hajj?