Company credit cards & understanding them

We are new to Netsuite and trying to determine best practise for company credit cards.

Historically, how we have performed card transaction is that they are each entered under a CC vendor bill, using the reference number to identify specific employee cards. The main vendor is the card company, there for each card is entered for each employee, but under the same CC vendor. Each line item is matched to the aggregate expenses for that statement (example, auto fuel line item = all fuel costs from that card statement).

This system has two flaws: (1) lacking employee tracking/timeliness/responsibility for their own expense entries; (2) stuck creating backend journal entries when purchasing inventory using the cards and having to attempt to maintain a "Credit Card Inventory Clearing Account" to register and track incoming items, but badly.