I'm a little confused by it myself.
The first problem is that in the store cart details server behavior, the name column is set to number and it should be text.
I guess in the server behavior the value of that column comes from somewhere. The large character is probably the session_id value. It is automatically generated by php unique for each visit to your site. You could instead show the session variable which is the orderid from the store cart summary in database server behavior if you wanted a more regular number.