The SS-FHA thought highly of Krüger, and wanted him get some experience as a divisional commander. They therefore assigned him to take over the Nord battlegroup, which needed new leadership. However, then Arthur Mülverstedt was killed in action, and the SS-Polizei Division needed a commander. It was fighting in the drive on Leningrad, which was higher-priority than Nord in Findland, so Krüger was sent to the SS-Polizei Division, a unit he was very familiar with from his stint as divisional Ia a year and a half earlier.
That's my take on the document, you likely reached a similar conclusion yourself. Yerger doesn't mention this in his new German Cross in Gold Holders of the SS and Police volume 5, and I had never heard it mentioned before. So you have found a new piece of information! That's exciting, congratulations!