Checkmarx Software Security Engineer interview questions

Initial call with HR Representative was asked for salary range which I provided and she said 'perfect we are in the exact same range'. Had an initial conversational interview with the hiring manager, and then a technical interview with the hiring manager and the entire team I would be placed with. This interview seemed to go really well and I was told I would be contacted shortly. After two weeks, I had an offer from another company, I called the HR representative to check what was going on. On this call she told me that she had not heard anything and then asked 'oh by the way did I tell you that we are actually not in the same range on the pay?' After this call, I never heard back, no explanation, nothing. Completely unprofessional and I will not be considering a position here in the future after having so much of my time wasted.