Hi there!
So 1st thing: attacks are used using a d20 to determine if you hit the other monster. This total needs to meet or beat the opponents AR or MR (depending on what skill you use). Your other stats also can make this chance to hit higher, and upgrading skills let you increase damage. You can find this info in the “How to Play” section. I do think it is explained clearly as of now, but I can understand the confusion. It is a small portion, on purpose, to avoid bloat on the document, as this game is offered for free to all.
2nd thing: They are different values for some reason, and some time I’ll go back and fix it! Thank you so much for letting me know. I would choose which one you’d like to use, but my recommendation is the Expansion base-stats for challenging games, and the base handbook version for more relaxed games.
3rd thing: I didn’t see the same text for abilities and skills. If you have photos proof, let me know, as it may be a document error with the PDF!
4th thing: That’s just it; different covers! When I made this game some time ago, it was understood in it’s marketing, but I’ll have to add that to the actual store in case it’s confusing for others.
All on all, thanks for letting me know about these things! I’ll see if I can fix these things in the future, but also feel free to bend any rules or make your own with my games! They are meant as a basis, and you’re more then welcome to customize them!
Hope you have fun in the world of Disk Masters!