I upgraded Intersoft WebUI package from 2016 R1 to 2017 R1. After upgrade, I realized there was an odd issue on file versions. The last release must has higher minor version number but on this issue, the previous release has higher minor version number.  Matched list between two different versions listed below. 

2016 R1 ISNet.WebUI.WebCombo.dll 7.0.7200.280

2017 R1 ISNet.WebUI.WebCombo.dll 7.0.7200.276

2016 R1 ISNet.dll 3.0.5000.978

2017 R1 ISNet.dll 3.0.5000.975