This summary is not the rule. The rule text controls.
When someone files a lawsuit in Mississippi, they don't have to limit themselves to just one claim against the other side. A person can bring as many different claims as they have against an opposing party, all in the same case. This applies whether it's the original lawsuit, a counterclaim, a claim against a co-defendant, or a claim brought against someone new who's been added to the case. These claims can be brought together even if some are backup options that only matter if another claim doesn't work out.
The rule also lets people combine claims that used to have to be handled separately, one after the other. For example, if a person used to have to win one legal claim before they could even ask for a certain type of remedy, they can now bring both claims at the same time in one lawsuit. This saves time and avoids forcing people to file multiple lawsuits about the same basic dispute.
That said, joining claims together doesn't change anyone's actual legal rights. The court will still decide the case based on what each party is actually entitled to under the law. Combining claims is just about convenience and efficiency, not about giving anyone new rights or taking rights away.