Call of Cthulhu 7th edition sheet problem

I definitely prefer the sheet made by Aqua Alex, Matthew Carpenter, Roric, and Orp over the one made by Roll20. It's much nicer to use and the even the colour scheme is much easier on the eyes. That said, there does seem to be one problem. When rolling for bonus/penalty dice the sheet makes three separate d100 rolls. This isn't how it works in 7th edition. There's supposed to be one d100 roll, with additional 10s dice, then you pick the best or worst 10s dice. So if you're making a roll with a bonus die and get a 20, a 60, and a 7, the final roll would be 27. Is there a way to have the sheet make three rolls, but keep the "ones" value from the first roll? 

Is this a problem with the Official Roll20 sheet, or with the one made by Aqua Alex& the others?

The community sheet.  The way it works is the easiest way to do it based on what is available to us and really there is not a lot of difference compared to the work that would need to be done to make it conform.    This has been discussed many many times as a forum search would illustrate.

OK, I guess I'll just tell my group to ignore the purple dice buttons. Easier than actually fixing the problem I suppose. Or, since it obviously doesn't work (the way it works now gives a lot of false successes and failures), and there doesn't seem to be any interest in fixing it, why not just remove the purple buttons entirely?

As I understand it, the sheet is functioning correctly. The Roll20 dice roller doesn't contain the provision to transparently and effectively transpose the 'digits' element of a d100 roll onto the 'tens' element of another. Once a value is generated, it can't be modified. As a result, there are only approximations that can be made at this mechanic. Both this sheet, and the Roll20 one, have attempted different ones. In this sheet, multiple 1d100 results are rolled, and treated as a single roll with the alternatives used as stand-ins for bonus/penalty dice rolls. In this way you end up with a 0-9% inconsistency between what the result 'should be' and what it ends up being. The Roll20 sheet simply rolls a d10, and lets you do the math yourself. There are other solutions that could be achieved, but all of them are probably less satisfactory than either of these choices.