Help debug a Node.js Script (variable values being overwritten)

Hi, I am using this package [login to view URL] to run "GetSellerList" calls on the eBay Trading API. When a seller has multiple pages in the first response, a second, third, fourth etc... xmlRequest() page request needs to be made to collect the subsequent pages. I have the bulk of the app working, however I have issues with variable values being overwritten and I require your help as an experienced developer to help me "fault find" and show me where I have gone wrong. So to be clear with what I need your help with: #1 Identify, solve & explain why I have the issue of the variable values being overwritten when the app is run, with multiple requests for multiple users being processed #2 Any suggestions on tidying up the code (single file at the moment!) #3 You help is required on a *Removed by Admin*l, so fantastic spoken English is required. The app code will be shared with you when needed. Is this something you can help with, let me know in your application!