I've done as you instructed. No problem. I added other products, I deleted products, heck, I even set up multiple addresses and switched between the two. No sign of any problem.
Unless you can find a *reliable* way for me to duplicate the issue then I'm afraid I can't be of much help.
Oh, I did have one issue, but not sure if its related. I took the checkout process through to the payments selection, chose paypal, and received this error:
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Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator,
[email protected] and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
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I've never seen PayPal suffer an internal server error before.
The fot plickens
Cheers
Rod
ps. I'm "John Smith" in your store.