As for ensuring depreciation is right, it's probably not. The program "can" figure it correctly. But you have to "know" where the problem is. Basically, as you work through the asset there's a screen that ask you for percentage of time it was rented. For a situation where you have less than 100% ownership, do not enter percentage of time. Instead, enter percentage of ownership. Then, assuming all other data has been entered correctly, the depreciation will be correct. I assume you are using the worksheet on page 37 of IRS Publication 946 to manually figure the depreciation to confirm the program has it right.
