Ok, it doesn't work that way. You CANNOT accumulate extra licenses on one account; you can pay for three but you get only one license. And you MUST NOT share an account under any circumstances. So what is actually happening is that your account is being used (improperly) on two machines. When you try to use the plan on a third, your two-device limit is reached and you must sign out the others. You will need to contact Adobe Customer Service to resolve this. Hopefully, they will be able to either cancel the redundant plans (there may be a charge for that) or transfer the two plans to the two specific employees of the company. Note that there is no way to share licenses; if for example, you have four employees and two at a time need to use the app, you need four accounts and four licenses.
Individual licenses belong ENTIRELY to the individual. You - as employer, or person who pays the bills - have no rights over it whatever: you cannot cancel it, sort out billing issues, or transfer it. For this reason, Team Licenses are preferred for small companies with employees. The same rules - one license per person - apply, you aren't paying for a license to share with a team of people. But you get to administer the account, and can reassign licenses.