The client structures really are pretty goofy. I guess the client itself is also pretty goofy but the structures should be fixed!
For example , the minimum buy-in for 2/5 Full Ring is 250( 50 BB ) and the minimum buy-in for 10/20 Full Ring is 200( 10 BB )!
Another example is 10/20 heads up the minimum buy-in is 500 and for the Full Ring it's 200 , you should never need more for heads up then you should for a Full Ring table!
Also , since the heads up maximum buy-in for 10/20 is 4,000 I think the Full Ring should be raised to 4,000 as well. I could give more examples but I think I made my point.