Using a tab control to show/hide layout objects does not work in list view to hide/show differently on each record as the go to object script step pops a particular panel to the front for all the records in your found set at the same time.
You'll need to use a different method such as the portal trick.
And recalling this file makes me real glad to be using "hide object when" in FileMaker 13 and thus avoid having to use any of these methods...
Boogers!... One would think it wouldn't take 13 versions before realizing hiding and showing objects easily would be convenient.
The portal method isn't all that difficult to set up and often does not require any scripting to make it work.