Incorrect ASL on children's alphabet toy?

I received this children's/early learning sign language toy and noticed that some of the letter tiles seem to have incorrect ASL on them.

I have just started trying to learning ASL seriously after years of being interested in it, and a friend gave me this as a bit of a joke gift/potentially useful gift.

I was going to regift to someone it would be more useful for, but I noticed when I took a closer look that some of the signs seems to be different from how I have learned them (for example: m, n, p, t). I did quite a bit of searching but couldn't find anything really conclusive about it, even on the manufacturer site, so figured I'd ask here. Am I right that some of these images are incorrect, or are they some sort of variation of a sign language alphabet that I'm unaware of?

Thanks in advance for the help!