Experiencing issues with inventory control on Shopify?

Yes, unfortunately I have tried all the Shopify ressources, I have spoken to multiple experts that give me different answers every time I call.

I am trying to reach out to other Shopify Retailers that have 300+ inventory items to see how they control their inventory???

Yesterday, I did an inventory count and I adjusted the quantities on hand.

This morning, I checked and some of the amounts have changed and different than what I entered!!

How???

The numbers that I entered last night should be the same numbers this morning???