Hi Washingtonn

You are correct.

As the the designline is interpreted from the source, as soon as the criteria is met then that item is used.

You can create your own Button Codes in your service and when used they survive the 'erase' and 'fill in 3d'. They need to be in your service as alternatives if they are stacked. I think this could help you out.

If you have 2 bends on one Button then you need to set the lower and upper limit for each Item. I think the size limits are the only way for the software to determine which one to use. (You might be able to do something with scripts.)

Hope this helps.