Synkro: Inventory Sync Shopify App

UPDATE: Change from 3 to 5 stars. After leaving the original review below, Eric reached out to us and worked with us to resolve the issues we had. In the ~18 months since working on these issues, we did not have them anymore. Additionally, the app has continued to add useful features and the user interface has gone from very basic and somewhat outdated looking to very intuitive and professional looking. Would definitely recommend.
ORIGINAL REVIEW BELOW
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We've used Synkro for about 6 months now to sync inventory between our 2 Shopify stores. While it works well 95% of the time, sometimes it causes inventory issues.
For example, let's say we have 50 of a product in inventory. Our inventory will show 50 in stock on both store 'A' and store 'B'. A customer places an order on store 'A' for 4 items, leaving the inventory at 46 on store 'A'. Synkro will then subtract 4 items from store 'B' so it matches at 46. However, sometimes, rather than subtracting 4 from store 'B' to make it match store 'A', it will add the 4 items back in to store 'A' to make it match store 'B' and our inventory will now show 50 in stock on both stores again when we physically only have 46.
This has happened several times now, and unless you manually go back through the inventory history of every product on both stores, there is no way of know when it occurs until you oversell.
Need to have an option within the app to set it to NOT add inventory back in unless triggered by an inventory transfer or manual inventory adjustment by store personnel. The app should not take it upon itself to add inventory back in without a triggering event.