Good find! It’s only the printing on the PC board that is backwards — the actual pin traces follow the standard Grove I2C Pinout: SCL-SDA-Vcc-Gnd (as shown on the schematic). So this shouldn’t be a problem for anyone using a standard Grove cable with connectors on both ends, but if you use one with flying leads or are hacking together your own cable, then the misprint could cause some confusion. I’ll be sure to update the v0.3 and v0.4 board documentation to include a note about the misprint. Thanks!