Please, if your django autocomplete doesn't fit very well, add this to your styles css file or as a css script in your html:
.select2-container {
width: 100% !important;
min-width: 10em !important;
}
/* django-addanother bootstrap css fix */
.related-widget-wrapper{
padding-right: 16px;
position: relative;
}
.related-widget-wrapper-link{
position: absolute;
top: 3px;
right: 0px;
}