No it does not. Krivosheyev's data specifically states that it contains (of the V-P offensive) Leningrad Fronts losses between June 9 and June 20. And as it happens there are wide (and i do mean wide) variety of documents on the Soviet side (including STAVKA orders signed by Stalin) confirming that Leningrad Front's offensive continued well past the June 20 in addition to numerous Finnish & German sources. In short those losses are totally ignored by Krivosheyev.
And no they were not insignificant. Actually they were rather heavy. And they were not included in "another unit's losses". For one reason or another the data was not included in Krivosheyev's lists. Granted Krivosheyev's data stops at sort of logical spot - that is at conclusion of the Vyborg offensive. However it totally ignores the 'Lappeenranta-Virojoki' offensive ordered by STAVKA to start at June 21 by Leningrad Front (as well as offensive towards 'Kymijoki' also mentioned in STAVKA order) south of the operation boundary set between Leningrad and Karelian Fronts. And yes. It was
in addition to the Karelian Front's offensive which also begun on June 20 - 21.
For reference..
Ставка ВГК. 1944-1945 гг. Том 16 (5-4), and link:
1944-1945.doc. Relevant orders are #117 and #120. Though #121, #171 and #190 are also very informative.
And as said Manninen (Finnish historian) has tried to piece together the Soviet losses for the time period omitted by Krivosheyev but i doubt - from the rhetorics - that you would accept those values even though those are based on the data from Soviet/Russian archives.