how excise invoices are sorted in Excise invoice selection screen (J1ij)

Sir

when I do excise invoice creation in Ji1j for customer depatch, in the excise invoice selection screen , the excise invoices are not sorted properly, i.e excise invoice related to 2011 appearing first and then 2008 is appearing then again 2011 is appearing.

can some one tell me how these excise invoices are sorted?

Jaya Anand