You did not prep your deck, you have to sand, de-mold, wash and then blow clean it.
No stain will work if you do not prep the surface.
The sad thing is that I did prep the deck to the tee that behr recommends on the label. I used all Behr prep products. I sanded the deck, cleaned all dust with their prep cleaner, waited four days to dry completly, and did two coats with Behr Deck plus solid latex stain. I used a **** load of stain. It says one gallon will coat 200-400 sq. ft. but it didn't cover that great. I used a lot more than two gallons. So in a way you buy a cheep can of stain, but end up spending more because it doesn't go on great, so you are buying more cans of stain.
Good news though, I called Behr and complained. They were fighting the claim saying I used too much stain. Just for you to know, if you call to complain, tell them you did everything it told you on the label and that you used the exact amount it told you- because if you don't, they will fight it saying you did it wrong-there for it is your fault. I asked for $300.00 for all the cans of paint, time, supplies, sander, and prep solutions. I have to send in pictures of the can on the deck, pics of the damage, pics of the whole deck, and the upc off of a can. It takes three weeks to process. After complaining how bad of a product it is, they wanted to send a pro out to do my deck with the same stuff I was complaining about. Anyone going through this good luck. My advise, get the money and not another application of a ****ty product!!!! save your upc and or receipt!!!