You are not doing anything wrong. A nameless point is not possible. The software must have a name to keep track of each point internally. You may assign a name to each point. Seamly will automatically assign a name. You are free to use the default name (usually something like "A1, A2… B1, B2… etc) You can assign meaningful point names to whatever points you wish. This answer applies to both the Seamly2d program and the Valentina program.
Please note that I called the program by its current name, Seamly. You will note that on this page at the top, the name of this forum is the Seamly2d forum. The URL that shows in the browser window, “forum.valentina-project.org” will be eventually changed as part of the rebranding process. Please bear with us as this happens in a way that attempts not to leave behind any existing users.
If you choose to use the Valentina program instead, please see http://valentinaproject.forumotion.me/ which is the forum to support that program.
If you are just starting out, you might want to check to see that you are using the most current version. To get the most current version, click the “Download” item at the top of this forum page, enter your email, and download the newest version.
Last summer, the project had a “fork” which means one branch of the project continued on with the name Valentina and another branch is in the process of renaming and rebranding itself as Seamly2d.
This forum will continue to provide support for the Seamly2d product. If your questions are relevant to both, someone here is likely to know the answer and will help you. (We are a friendly bunch). If you continue with versions of the Valentina program it is likely that you will encounter issues that nobody here will know an answer to share with you.
Meanwhile, welcome to the forum. Please feel free to post an introduction under the topic “newbies” if you would like to get acquainted.