How to stop 8month old from peeing/poking in crate?

They don't usually like to use the bathroom where they lie. However, if they have to go they will and if it happens continuously, it will become something they become comfortable with. It sounds like you're doing great but need a stricter routine. You do not mention much about the feeding and watering schedule. Taking them out to use the bathroom after a meal is a good idea, but meals should also be withheld if a puppy is going to be crated for longer than an hour or two. Keep meals early in the day. Also, just before bedtime, try taking her on a much longer walk. Make sure the bladder and bowels are completely empty. If this doesn't seem to work, keep at it, but also get up earlier to let her out. Stay consistent.

I had a eight month old German shep who I had to crate train. She did her business a couple times in the crate but you just have to be mindful about taking her out to pee maybe about every four hours or less. Also what I did is I made the crate so tiny that her bed was as big as the crate so she had absolutely no room. As she grew I adjusted the crate. If your pup continues to poop inside the crate then you need to take her/him out more often