Махнах всички интервали:

$q1 = "select*fromtutors_members,tutors_members_categorywheretutors_members.MemberID=tutors_members_category.MemberIDandtutors_members_category.CategoryID='10,0'";

и после ги сложих както трябва:
$q1 = "select * from tutors_members, tutors_members_category where tutors_members.MemberID = tutors_members_category.MemberID and tutors_members_category.CategoryID = '10,0' ";

Резултат:
Unknown table 'tutors_members_category' in where clause