Jacob -

Sage300CRE has a retrieval heirarchy to build which account gets retrieved when transactions are created.  As a general rule, the suspense accounts get hit when there is incorrect setup.  Since you mention Company 1 and 2, I would suggest reviewing your inter-company accounting settings in the application of origin.  Since you mention check written, I assume AP.  Most likely an invoice expensed to 1 company was paid with another companies checking account.  If you reconcile CM to GL in both companies, you will probably find the reconciliation to be off by this transactions amount.

Do some investigating and post your results as it will dictate how error correction is performed.

Cheers,

John McLagan
Independent Senior Consultant
Johnny on the Spot

Here's an article to help you start investigating:  https://us-kb.sage.com/portal/app/portlets/results/viewsolution.jsp?solutionid=223924850045421&page=1&position=6&q=INTERCOMPANY%20SUSPENSE 

Here's an article to help you understand the hierarchy and settings.  Be sure to see the links under Intercompany Accounts: https://us-kb.sage.com/portal/app/portlets/results/viewsolution.jsp?solutionid=223924850045770&hypermediatext=null  

And yes, let John know what you find so he can help you with error correction.