Our engineers decided these where the best tested default settings from many tests. Additionaly alowing you to adjust some of the perameters in our daemon acordingly to be matched with the approved initiatotoers. Many adjustemnst can be made as you are experincing just as long as you keep them the same on both sides. Many other manufactures have different settings as well. I use this site below to perform many different test and this might help in your research for your environment as no two environments are usually the same.

http://www.zvon.org/tmRFC/RFC3720/Output/chapter12.html