1. I've not heard of such issue. Keep in mind that LoadUI measures from the client side. By default, it measures this:
Any SoapUI TestSteps prior to the server request + Client network (software+hardware) interface + Network latency for response + Server network interface + Web Server processing time + App Server processing time + Server network interface + Network latency for response + Client network interface + Any TestSteps after the server request
While your server is probably measuring this:
App server processing time
or this (depending on where you get your measurements from:
Web Server processing time + App Server processing
Regards
Henrik O
SmartBear Software