Here are links to the A1 and A2 Spanish courses which were recently removed from the Course list and replaced by “Spanish 1”, “Spanish 2”, etc:
The new Memrise-created courses Spanish 1, 2 and 3 equate to the previous A1 Spanish course, and the new Spanish 4, 5, 6 and 7 equate to the previous A2 Spanish course - although there is some different content in the newer courses.
For background, there was wider discussion about the replacement of the A1 and A2 courses here: A1/A2 French, German and Spanish courses converted to A1=1,2,3 / A2=4,5,6,7