On every CRJ100/200 seats 1B, 1D, 2B and 2D are always blocked making it impossible to get 2 seats together in the first 2 rows.
This screen grab is from a DSM-MSP flight that is 331 days out and it is the same for all flights from 325 days out to 330 days out.
Why not block 2 together? What's the point of this? I end up booking 1C and 2C as Mrs. P. and I both like aisles.