ET Signal unlikely but Spectrum Analyser in 3 Dimns shows more of them?

Whilst dabbling with an old on-loan Spectrum Analyser last year I was searching for potential ET Signals (in my dreams). Without any success but then, I did something strange with the frequency dial. Spun it at an increase rate and began to obtain several promising ET-like Signals (refer to attachment). So Spec Ana was sort of operating with an extra dimension. Probably was caused by simple equipment glitch but you never know!