If your chat representative was not able to deal with a QBSE issue they should have said so. See again the chat record attached.

The expenses have been categorised as travel expenses and show both as allowable and disallowable.

Expenses categorised as other business expenses are also showing as allowable and disallowable.

I have looked back and this is the same for all years I have used QBSE.

This just can't be right, and contradicts what you're telling me about categorising as Travel expenses.