Yes because they have a different "syscall number".

Doesn't really matter if it has the same name or similar (or identical) function. This website seeks to describe the syscall ABI and that means that each number should get it's own entry.

And there is no identical syscalls in the list, they all have slightly different behavior.

It would be nice to make a banner or warning for deprecated or surpassed syscalls. For example (as mentioned in other comments) you should probably use pipe2 instead of pipe and similar other examples.