Hi Manasa!
Did you do sales kits in earlier versions of Epicor without this problem? Just curious if this is some new "feature" I'll find in E10... We use parent pricing on sales kits. Is that what you are using?
The only thing I can think of is a problem with child pricing and adding / removing lines from a pack?
I haven't tested invoicing sales kits yet in E10, should be coming up to it shortly.
Jenn