Oh yes, sorry. The L1 version is the only one with a 1/2 die progression. The L2+ versions are the listed damage dice per caster level.
So, a 10th level caster would do 5d3 with the first level spell, 10d3 with the second level spell, 10d4 with the third, 10d4+10 with the fourth, and 10d6 with...