Also see the Scripting Wizard release notes for some more information on the scripting wizard. This is only a UI problem and should not affect functionality. I will probably release a 1.0.1 scripting wizard soon to fix this. As mentioned in the release notes, the scripting wizard does not support merging with existing script code. In order to optimize script code, I have made Max Instances a required value in the wizard.
Higher values repeat more slowly.
The initial release requires that firing be implemented the same on all maps within a project. A SpriteDef by the specified name must exist on all maps. In the initial release, the scripting wizard is somewhat limited in how it deals with inventory. If you need more complex interaction, it will have to be handled by manually editing script code. As you can see there are a few limitations to the scripting wizard.