Import product - How to set Category ID and ACL

Hi,
I am using nopCommerce 2.8 with Sqlserver 2005

I am trying to import  products from  excel sheet ( template from export products ) . Currently i am facing following problems

1) Category mapping :-  I had two cateogories 'A' and 'B' w.r.t id's as  1 and 2 .
    In Excel sheet, CategoryIDs column I entered   '2'
    After importing , product got imported successfully . But categoryID ( say '2' ) was not mapped
2) Can we map multiple categories while importing if so how ?
3) Also , Can we  import product's  ACL  from excel sheet?

thanks & regards,
Arvind