I also had some what similar situation like your long time ago. I had obtained my stamping from Vancouver, Canada first time then that H1 was expired after few years and I got another H1B stamping from KTM when I went to get married. The consular was trying to trick me in to confessing that I worked illegally when I was in OPT but without a job for 9 months after graduating. Just be careful when answering such questions and have all docs, you will be fine. Good Luck.