I agree with Nalapani, he is very true. do not forget that Basnyats/basnets  are tagadhari chhetries meaning they used to eat meat and drink liquor. I think sirupalis and chapptadis are same basnyats some went to khaptad and some were in Gorkha. I have lots of basnyat family members sirupalis and khaptadis and some of them write basnyat where as some write basnet based on preference both sirupalis and khaptadis do that. 
Also notice that basnyats specially khaptadis look more like magars or mongolians as they were very close with magars. i fully agree with Nalapani ji. Nalapani ji if you could please update the wekepedia page about basnyats it is totally wrong specially about khaptadi basnyats stating that khaptadis started by bhotu basnyats granted title by his father.