Basically, yes.

(1) uninstall the second member.
(2) When you reinstall, there is a spot on the registration form to tell it you are already a member. After that, two computers should be attached to the first member name.

The work done by the second member that is uninstalled is still there for statistics, but cannot be rolled into the first installed member.

It is possible to generate a new team that holds both members (before deinstalling/reinstalling), but since you are new, I would just advise joining an existing team. We need all of the new members wse can get, you know.

There is a team area that has recent postings from several teams, or it is also possible to search for another team of interest after visiting ANY team member page. (You don't have to join it to do that.) On the member page look for "Find a team" on the left side.