Doing a search on
ebay USA, and using the advanced search by seller... this is the string/link
www.ebay.com/sch/i.html?_nkw=&_in_kw=1&_ex_kw=&_sacat=0&_udlo=&_udhi=&_ftrt=901&_ftrv=1&_sabdlo=&_sabdhi=&_samilow=&_samihi=&_sadis=15&_stpos=28739&_sargn=-1%26saslc%3D1&_salic=1&_fss=1&_fsradio=%26LH_SpecificSeller%3D1&_saslop=1&_sasl=duncanvr&_sop=15&_dmd=1&_ipg=200
I get 208 results for seller duncanvr with two different operating systems and 4 different browsers. different computers and different browsers or versions should not return different results. The code is 'server side', it runs the same way every time. The client side browser would never interpret the search code differently.
One important difference that may exist is between different servers,
ebay has a lot of them across the world. Each
ebay server is customize differently depending on what they feel users in that part of the world desire.
Post your search strings/links and we may be able to determine what is going on.
Don