the whole pot should be evenly hydrated friend,,, roots will air prune into dry soil,,, It almost impossible to overwater in cloth pots
so next go maybe try this
1 use a buffering starter seed mix in the center of the pot
2 sew seeds directly into final pot
3 water entire pot and cover the seedlings with a small water bottle with the bottom cut off to keep humidity high
That soil should provide a month of food for an auto before it needs amending, but for it to do so, the soil must be evenly hydrated as plants roots wont grow into dry soil
I think you may have a convergence of several easily remedied issues that caused this.
I use ffof in cloth pots... Ive been reusing the same soil going on 5 years now.. ive intentionally tried to overwater in these pots and unless you get really crazy, its not happening..
GL!