JSR Returning to wrong place in code

It's usually a problem with the stack. This happens when you push inside a function but don't pull before the RTS/RTL. Same thing if you push then do a JSR then pull or another thing, pushing twice and only pulling once. But this is really common mistake for me and for a lot of ASM newbies, maybe you're talking about something else...

Edit: Or are you saying your JSR goes to another offset than the opcode params???