I need to add form which has a textarea to post. The editor understands the closing tag of textarea as a closing of editor textarea. I can save the post and it looks alright but when I come back to edit the text everything that is behind that textarea closing tag is actually OUTSIDE of the editor window. It's like if the text had merged into the WordPress itself. I can't edit it anymore unless I change into code-view, go back to Posts-list and then come back to editor. Then the editor shows the full code and I can edit it.
This isn't nice solution when I think of my client who doesn't know anything about coding.
Are there any solutions for this? Does anyone know any other way to make textarea than using the actual textarea-code?