I've got the same issues as found in this thread:
https://community.quicken.com/discussion/comment/20468135#Comment_20468135?utm_source=community-search&utm_medium=organic-search&utm_term=short+sales
All Short Sales are recorded as Deposits of Cash; downloading from Schwab.
All I can do to fix it, is to Edit each entry; changing it from Deposit to Short Sale, entering in the ticker, shares and cost sold (cash received)….
Help, looking for a resolution, as this is very frustrating.
Quicken Classic Premier
R66.18
Build 27.1.66.18
Windows 11 Desktop version