Inventory always changes on its own

So this has been happening for the last 20 years that we have been using MYOB, and to the point that is it worth the $160 i pay each month for this software?

MYOB always seems to change the stock levels of our business.

I did a stock take on 29/6/22 , adjusted all the figures in the inventory section to match.

It was over 11k out!!

I just did a sale this morning only to have MYOB tell me i have 1 itme left, knowing i have more than this.

I go out to the warehouse and count that i have 30.

This isn't a random event and has been happening for ages.

IS THERE ANY ANSWER TO THIS?

WHAT AM I PAYING FOR IF YOU CAN'T EVEN KEEP TRACK OF STOCK?

We are not incompetent users, i was an accountant for 10 years before taking over a family business.

Not that happy!!!

Ian