We currently support the parameter keys, category and expandlevel. Since the view is categorized then maybe you can use the category instead of position?
http://restserver.ibm.com/XPagesExtOld.nsf/api/data/collections/name/AllThreadsByAuthor?keys=Lessie Dean&expandlevel=1
Sample output:
[
{
"@entryid":"6.1-96B6EB7D6AA9D56C852578110047D168",
"@unid":"96B6EB7D6AA9D56C852578110047D168",
"@position":"6.1",
"Author":"Lessie Dean",
"Title":"Curabitur a neque ipsum",
},
{
"@entryid":"6.2-4C7307F09C589B4F852578110047D16C",
"@unid":"4C7307F09C589B4F852578110047D16C",
"@position":"6.2",
"Author":"Lessie Dean",
"Title":"Sed elit lorem",
},
{
"@entryid":"6.3-B301036F472B523A852578110047D187",
"@unid":"B301036F472B523A852578110047D187",
"@position":"6.3",
"Author":"Lessie Dean",
"Title":"In non massa a libero dictum tempus",
},
{
"@entryid":"6.4-A0FFFF23AC87EBD3852578110047D1D7",
"@unid":"A0FFFF23AC87EBD3852578110047D1D7",
"@position":"6.4",
"Author":"Lessie Dean",
"Title":"Etiam lobortis sollicitudin ante",
},
{
"@entryid":"6.5-8B1CB39924C8ECBA852578110047D231",
"@unid":"8B1CB39924C8ECBA852578110047D231",
"@position":"6.5",
"Author":"Lessie Dean",
"Title":"Curabitur augue metus",
},
{
"@entryid":"6.6-1F3E694B01FF5891852578110047D237",
"@unid":"1F3E694B01FF5891852578110047D237",
"@position":"6.6",
"Author":"Lessie Dean",
"Title":"Nulla nec risus arcu",
},
{
"@entryid":"6.7-5BF3122AA929D2E7852578110047D28D",
"@unid":"5BF3122AA929D2E7852578110047D28D",
"@position":"6.7",
"Author":"Lessie Dean",
"Title":"Mauris sit amet tellus ac odio tempus dignissim sit amet ac sapien",
},
{
"@entryid":"6.8-1A4C05A754DBF2ED852578110047D291",
"@unid":"1A4C05A754DBF2ED852578110047D291",
"@position":"6.8",
"Author":"Lessie Dean",
"Title":"Praesent eget velit nunc",
},
{
"@entryid":"6.9-6A44086E00CAA8BC852578110047D2A1",
"@unid":"6A44086E00CAA8BC852578110047D2A1",
"@position":"6.9",
"Author":"Lessie Dean",
"Title":"Nam eleifend ante sit amet lorem gravida varius",
},
{
"@entryid":"6.10-34DF3563C4138759852578110047D2A4",
"@unid":"34DF3563C4138759852578110047D2A4",
"@position":"6.10",
"Author":"Lessie Dean",
"Title":"Pellentesque dapibus sem at felis cursus sed imperdiet tellus porta",
}
]