SupplyHouse.com interview questions

I was having a phone interview with them about 1 month before I heard from them that they would like to have me visit their office. Then I asked them about the reimbursement for the travel expenses and the HR who contacted with me said she needed to ask her supervisor. Several days later she emailed me and mentioned that they are able to reimburse that, however, I already got an offer and did not want to go visit them anymore. So I replied them politely and describe my situation. Another several days later, a guy from the company called me and asked me why don't I go to the onsite interview. I told him the reasons and he said they really want me to visit their office and take a look at the working environment. Eventually I said ok to him. Then I sent an email to the same HR contacted with me and asked her how to process the onsite interview stuff. I was surprised to receive another email from her mentioned that they would like to have another phone interview in advance of flying me onsite. I was confused about the process. I was in the phase of arranging the onsite interview stuff and now they want to have another phone interview. As a result, I declined the phone interview via email and never got any response from them. Also, I heard from my department recruiting coordinator, she told me that the reimbursement policy of this company is confusing. Some of my classmates get reimbursed but some do not.