Importing from Excel into Workfront is not a native option. You could use fusion if you have that available to you. 

The only way to do it is through the access level for the group admin.  

Overtime is not calculated by default in Adobe Workfront, but you can create a Timesheet report that calculates overtime.   View: Calculate Overtime Cost in a Timesheet View | Adobe Workfront

This sounds like a bug. I would submit it to Adobe Support or have you system admin submit it for you. 

@MorganHatcher  is correct. In Workfront, it's a 1:1 relationship. You could create custom fields to identify that it's part of additional areas, but from a native functionality, it's not possible to associate it that way. 

According to Chatgpt not much to do with actual project expenses just labor costs.     The allocation date field in a Project (Financial Data) report represents the date on which planned labor costs (allocations) are scheduled to occur. In Workfront’s financial reporting, allocations are the planned...

Unfortunately, you can not change the default number that shows on the screen without manually intervening. Even a report will default until you manually change it. 

@skyehansen is correct. I asked support this question as well, and they confirmed it's not an option in views only on reports

You should be able to do this with wildcard filters.