This is a bug that has existed for a number of years. I've made a new year's resolution to influence quicken to fix it. Attached is proof that the budget report when unrealized gains are selected under the advanced tab, doesn't total correctly. Look at the total of the budget report I've attached. The total Income shows $9,414 but the amounts listed under Income only sum up to $5,799. What is missing is the unrealized gain amount, even though I have a budget for the category.
To further demonstrate this bug, I've attached an Income/Expense Category report for the same period. Here you can see the totals match the totals on the budget report but also show the amount of unrealized gains.
Conclusion is that the budget report has a bug that results in it not summing up all amounts correctly.
I've reported this issue to Quicken. They have logged it under ticket number 7333586. Unfortunately, they will not give me a timeline when this will be corrected. Additionally, I was told I needed the Quicken Community to support having this bug fixed. I do find this a little weird given their software isn't working correctly. I think we would all expect a report to add up correctly, would we not?