After reopening SoapUI the resource is changed to different request

I'm experiencing some weird stuff with SoapUI. So, I make a new REST resource with URI and create multiple requests (GET, PUT, DELETE). Then I create a testCase with the following testSteps: GET, PUT, GET, DELETE, GET. 

The GET testSteps are linked to the GET request.
The PUT testSteps are linked to the PUT request.

The DELETE testSteps are linked to the DELETE request.

Everythink works perfect like this! However, when I close SoapUI and re-open SoapUI, all of a sudden the PUT and DELETE testSteps are linked to the GET request..

I have absolutely no idea why this is happening or how this could even happen..