Inventory isn't being kept up to date

Today, I received this message from client using PS 4:
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"Yesterday I added a short online with an inventory of 2 for small black. This morning I noticed a women purchased 2 small black shorts last night, so out of curiosity I checked the inventory and it said there were 2 small black shorts available. I expected it to say 0 for small black. I just called (office personnel) to ask her about it and she said that she has had to go in and manually adjust the inventory. She noticed about a month or two ago.

I ran a test. I purchased a shoe that we only had 1 available in. I then checked the inventory and it said there was still 1 available in that size."
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Any ideas where to look to correct this issue? Same store as other support tickets.

Thanks much.

I have created a support ticket so we can look into this issue further.

To view and edit your support ticket, please log into your support history:
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If anyone else is experiencing this same issue, please append to this thread.

All fixed. Thanks so much for quick response.