it can be the fact that you had stressed your auto out and made it late flower. i had done this to a GSC from fastbuds and had around the same veg time. take care of her and she will give you a decent yeild
i usually do a normal germ soak some paper towels and let em sit man, just make sure u are nice to them as they are easy to stress. either way really works man its all personal prefferance
autos can out yeild photos hands down, sqaure foot wise. i average 4-6 ounces a autoflower and can get 4 in the spot a 16 ounce photo sits. go with what u like buddy yeilds can be achieved with both just alot of time and work to figure it out!