found seed in autoflower

1st grow.
3 berry ryder auto
1 auto assassin

Coco coir
1 gal square pots (I'm sure they were root bound)
General hydroponics nutrients.
Flood to waste
600hps 18/6
82deg avg. 30% hum

Harvested at day 61. Tri's were half cloudy.
Berry ryders were about 18" tall
Auto assassin was 10" tall

Hung for 4 days , hum dropped to 16%
Trimmed buds and found 1 seed in 1 of the berry ryders.

Taste: NOT GOOD
Buzz: Not much

What happened ?
All other plants in room were not autos and in veg .
Possible auto hermie ?

Are the rest of plants in room ruined now?

Please , answers or advice for what to do next.

Have 1 reg and 3 feminized plants in veg at week 8.

Thanks

immaculate conception....i think not....hermie....it cant pollinate if there are no pistils, maybe a few pre-flowers will get it but not a problem for you. good luck.....peace

1. harvest far far to early really no ambers? and probs flushed to early as well stunting growth
2. pots far to small 2-3g is considered the min AA will defo need 3g+
3. humdity far to low 40% min
4.temps to high
5. humdity was to low for drying and no cure used
aa should be about 2-3ft tall if grown right
you stressed your plants one was obviously not stable and hermed on you you will have to inspect you plants