@haenelbI just tested it on your expense report and was able to save the Internal Order number. Keep in mind I just selected any Internal Order Number from the list, but it worked for me. Can you try allocating the expense again, please?

When you click Save, and go back to the expense report, see if there is a little pie chart looking icon on the expense. If so, mouse over this and it will show you if it has been allocated and saved.

What happens when you click the expense entry and click Allocate, it opens the Allocations screen, but the allocations area shows as blank. That might be why you think it didn't save.

如果你看到饼图图标,你应该很好。Give this a try and let me know.