Classing on payroll additions does not split in 2016 version

When you want to class an "Addition" payroll item, such as allowances, the 2016 version now only classes that payroll item in full to the first item of your payroll "earnings".  It will not split the classing as per your employees earnings split.  (ie - track expense by class).  This used to work in the versions 2015 and older, and have now been advised by Tsupport, that this is an issue that the technicians are working on, but cannot provide any time when this will be fixed.  In the meantime, after everypayroll run, I have to journal the correct classing to ensure I have correct reports.  Processing payroll for over 40 on staff is not my idea of fun!!.  Reckon have had 6 months to sort this issue since the release of the 2016 version, and to date still not resolved.  How long is piece of string I ask.  Very frustrating from a reporting perspective.