I checked the status of the I-129 petition filed by my previous employer on December 1999. The status shows that the petition was withdrawn by my employer on June 14th 2000.
I applied for the visa extension during December 1999 and was waiting for the visa extension approval. The previous H1B visa was valid till the 2nd Jan 2000.
Due to unexpected circumstances I had to go to India. So, I left for India during the second week of April 2000. The I-129 was still in process but not approved.
I came back to the US using a fresh H1B from another employer during August 2000.
Will this be considered Out of Status? I am not sure.
Apart from this, there are no issues at all. I think that this may be the reason why they want to interview me. Ofcourse, I have not received any interview letter yet. But that is what the TSC personell told me about the possible course of action after the priority date becomes current in June 1st, 2007.