The way I understand it using photoperiod pollen on an auto will result in all photoperiod plants, just with a shorter flowering cycle (and even that doesn't always pan out).No worries.
Well, if you use regular pollen on an auto mom, the resulting seeds will be around 50% auto and 50% photo.
To make a lot of seed, I start dusting the plant (branch) from week 2 of flower.
Once a week for next 2 to 5 weeks
I can let the plants go longer as my window is different, I'm after seeds not buds so trichome ripeness is of no influence.
Crossing those results in 25% photoperiod, 50% fast flowering photoperiod, and 25% atoflowering.
Edit: using pollen from one of the fast flowering plants on an auto would result in 50% autos, is that what you're doing?