BGP AS collect issue

BGP AS collect issue


as the picture show , AS4319 was highlighted . but it actully was 135391, if you use as-notation format to express ,  it should be 2:4319,as i know , BGP AS has extended from 2 Byte to 4 Byte, it looks like NTA did not recognize the pre 2 Byte of BGP AS 

i test it on analyzer v9 and v12 , it has the same result .