Submission of two papers in one conference?
There is nothing wrong or unusual in submitting two papers on a single conference. For specific detail you should refer to the conference author guide. In my experience, there exists an upper bound of papers (about 3-4), but I have never encountered a conference where only a single paper was permitted.

The acceptance or rejection is individual, every paper is peer-reviewed on its own account.

You should keep in mind that the conference will charge every paper separately. You should also watch the presentation schedule for any conflicts (though, they are very unlikely)