ENVI band names are not read correctly

!cat Sentinel-2A__MSI__2018-01-08.hdr

ENVI
description = {Sentinel-2A__MSI__2018-01-08.bsq}
samples = 3000
lines   = 3000
bands   = 11
header offset = 0
file type = ENVI Standard
data type = 5
interleave = bsq
byte order = 0
map info = {Lambert Azimuthal Equal Area, 1, 1, 5696026.36304165, 1484919.6079648, 10, 10}
projection info = {11, 6378137, 6356752.314140356, 52, 10, 4321000, 3210000, Lambert Azimuthal Equal Area}
coordinate system string = {PROJCS["ETRS89_LAEA_Europe",GEOGCS["GCS_ETRS_1989",DATUM["D_ETRS_1989",SPHEROID["GRS_1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Lambert_Azimuthal_Equal_Area"],PARAMETER["latitude_of_origin",52],PARAMETER["central_meridian",10],PARAMETER["false_easting",4321000],PARAMETER["false_northing",3210000],UNIT["Meter",1]]}
band names = {
1,
2,
3,
4,
5,
6,
7,
8,
8A,
11,
12}
data ignore value = -9999.0

gA = GeoArray('Sentinel-2A__MSI__2018-01-08.bsq')
gA.bandnames

OrderedDict([('B1', 0),
             ('B2', 1),
             ('B3', 2),
             ('B4', 3),
             ('B5', 4),
             ('B6', 5),
             ('B7', 6),
             ('B8', 7),
             ('B9', 8),
             ('B10', 9),
             ('B11', 10)])