I really like that #10 bill. I'm no expert and I am not sure that being a bit off-center is considered an error. Same with the number that is out of alignment. But those two oddities along with the star make it an interesting note.
I'd keep the $20 bill too -- but I am keeping all the star notes that I find. I know I'm hanging onto stuff that probably has no premium but I like them and I just collect for fun.
If you're looking to sell them, you'll need to wait for an expert. I'll check back to see what they have to say.