I also noticed this annoying behavior a while ago and did send a bsv to support (sept, 14):
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2) Reload the Home Tab, now press Menu Manage Test2
-> the query opens in a new tab, click on Manage
-> the Test2 form opens with a Close button
-> press the ViewG button, the Close button is changed to Back !
-> Now press the Back button: first click does nothing, second click will take you back. If you'd press the ViewG twice, you'd need 3 clicks on the Back button.
I hope this will help you finding both problems
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In fact the problem appears not only when using html buttons but also any reference cell on a form.
This should probably be reported in the bug section, no ?