What are the reasons for a firm having lower cash from operations than working capital from operations? What are the possible interpretations of these reasons?

Cash from operations will differ from working capital from operations due to current accruals related to operations. In general, the differences between the two methods can be reconciled using the following approach:
Working capital from operations
– Increase (+ decrease) in accounts receivable
– Increase (+ decrease) in inventory
– Increase (+ decrease) in other assets, excluding cash and cash equivalents
+ Increase (– decrease) in accounts payable
+ Increase (– decrease) in other current liabilities, excluding notes payable and debt
Cash from operations
Cash from operations will be lower than working capital from operations when current assets (e.g., accounts receivable, inventory, and other non-cash assets) increase and when current liabilities (e.g., accounts payable and other current liabilities, excluding notes payable and debt) decrease.
Accounts receivable and inventory could be increasing because the firm is growing to meet additional market demand. Conversely, accounts receivable and inventory could be growing if the firm's customers are having difficulty paying for goods or services, or if sales have slowed causing inventories to climb.
Accounts payable could be decreasing because the firm's financial position has improved and the firm pays its suppliers sooner than before.