The accounts https://stats.stackexchange.com/users/9569/stat-r, and https://stats.stackexchange.com/users/9583/stat-r should probably be merged because they have been created from the same person, who asked about the merging on Meta Stack Overflow.
Thanks. A better way to indicate such situations is to contact the mods directly. One way simply is to flag any question; you'll get a textbox with space for a few hundred characters to explain what's going on.
In this case, it does look like these are the same user, but it's possible they are two different people who happen to have chosen the same moniker.