Deductions & credits

I have almost exactly the same situation on the Canadian Rental income. 

 

Can you please explain a bit more your answers? Thanks!

 

1) Can I take your answer "So in essence, you need to calculate what your US tax was on your Canadian income and if it was as much as $200" as "So in essence, you need to calculate what the difference was between your US tax and your Canadian income and if it was as much as $200"?

2) "Any unallowed credit can be carried over to future years."  -- Unallowed credit means the credit it too big (above the limit) for this year, hence can be allowed for next years?