According to his Whois entry, Shestopalov was "on work trips to Ivdel from March 2 to March 13, 1959; March 18-23, 1959; from March 31 to April 30, 1959," those work trips being the search (in the radio grams, "The officers named below shall be deemed to have departed on a business trip.")
I think the 14.11 is a misdate, personally but I don't discount much of anything with this case! Either way, excellent question!!