createsurface test case issue in libva-utils-v1.8

Now,I have found some issues about createsurface test case,here is what I have found:
first, createsurface test case do not limit surface size in v1.8 because not all GPU surface support 16x16 or 10240x10240
second,create surface with attribs will first query surface attribs and then create surface with these attribs
but maybe VASurfaceAttribIPixformat type attrib will have different value like this:
attrib_list={
{
......
VASurfaceAttribPixformat ,
VA_SURFACE_ATTRIB_SETTABLE,
value0
},
{
VASurfaceAttribPixformat ,
VA_SURFACE_ATTRIB_SETTABLE,
value1
},
{
VASurfaceAttribPixformat ,
VA_SURFACE_ATTRIB_SETTABLE,
value2
},
.....
}
but intel i965 driver just will get the last VASurfaceAttribPixformat value while calling createsurface and it is value2,so any issue in test case or intel driver?