Back Office has stock, Front Office shows out of stock (1.7.6.9)

[germinc]

Basically back office products is kept updated through manual updates when new stock comes in or when a large order comes in which bypasses the shopping cart. 

However, we find that the front office does not accurately display quantity, and shows out of stock when the product is still in stock in the back office.

Front office link: https://www.javysports.com/mats/1135-regular-folding-gym-mat.html

Back office screenshot as shown.

Does anyone knows why this happens, and how do I troubleshoot it? 

[germinc]

one more clue, on front office

if i see as guest, it's out of stock.

if i see as user, it's in stock. 

anyone has any ideas?