Wedding Cake Autoflower - Barney's Farm

Seedlings are 14 days old today, 18 days from planting the seeds. Much above ground growth last week! Notes from week two: 1. MJ2 (the plant on the right) is clearly stunted compared to her sister but appears to be otherwise healthy now that I've corrected the nutrients. I'm not sure how it is that, while I prepared the mediums for both pots the same way and while I've been watering both plants with the same amounts of the same nutrient solution, MJ2 showed stress while MJ1 looks quite healthy. 2. Runoff is showing higher PPMs for MJ1 than MJ2 which is likely a remnant of my overfeeding? 3. Over the course of the week I bumped up nutrients to early veg rates (600) and bumped up the lights (20 DLI). 4. This being my virgin grow and having already messed up once I'm inclined to just let these two grow naturally with minimal training, probably limited to SCROG.