WM Transactions

Good morning to everybody in the forum!

I would like to make a question about a problem that we faced after SAP Training on the WM Module.

When we load we sometimes have two or three users working on the same cargo. The sap consultant told us yesterday that we can not do this with the SAP because only one user can be in one transaction.

That is a problem that brings us much more hours of work for one simple cargo. Almost doubles the working hours.

Is there anyone who has a solution for this or faces the same problem?