Seeding Rails Database: id column doesn't start at 1

Working on a quiz/examination application. The questions and answers for the application have been written. The next question a user is presented with depends on their answer to the preceding question.

2 Questions:

• The tests being written are heavily dependent on being able to identify a question based on its id in the database. Is this a good idea/design?

• Currently, the assignment of id values when seeding the application database isn't doing what I expected. None of the tables start with id value of 1 - they all start with some random number (i.e. 3, 4, or 5). Why is this happening? And is there anything I can do to get ids of all tables to start with 1