Family Tree with Errors

Hey! Encountered a family tree, which may connect with mine from Norderhov, but a lot of it seems questionable. Essentially, I am starting with Hansine Olava Olsdatter Mælingen of whom I found: Birth: 17 Oct 1867 Norderhov, Buskerud, Norway Baptism: 28 Jun 1868 Norderhov, Buskerud, Norway https://www.digitalarkivet.no/en/view/255/pd00000020376910 From there I got father Ole Hansen Mælingen and mother Karen Olsdatter. I was able to find an additional three siblings of Hansine: Hans Christian Olsen Honenfos? Birth: 21 Aug 1862 Norderhov, Buskerud, Norway Baptism: 15 Nov 1862 Norderhov, Buskerud, Norway https://www.digitalarkivet.no/en/view/255/pd00000021503060 Anders Olsen Mælingen Birth: 11 Aug 1874 Norderhov, Buskerud, Norway Baptism: 27 Sep 1874 https://www.digitalarkivet.no/en/view/255/pd00000020381258 Twin? Hanna Olava Olsdatter Mælingen Birth: 17 Oct 1867 Norderhov, Buskerud, Norway Baptism: 28 Jun 1868 Norderhov, Buskerud, Norway https://www.digitalarkivet.no/en/view/255/pd00000030558461 From there I found the Marriage on 15 Nov 1862 where Ole Hansen Nerdre Honenfos? is listed as 26 (~1836) and Karen Olsdatter Gjermundbo eie? (Northeast of Hønefoss) 27 (~1835). One of the witnesses seems to be Hans Mælingen, so I would say this fits. Likewise, it lists Ole's father as Hans Christiansen Hangen?, although their family tree has it as Hansen. What does this mean, is this a name or a farm name? Karen's father is listed as Ole Halvorsen. https://www.digitalarkivet.no/en/view/327/pv00000010539782 Now the tree claims that this Karen Olsdatter from Northeast of Hønefoss is the same as Karen Olsdatter Gjellerud, which I only find in Flesberg roughly 60 miles southwest of Gjermundbo. Her parents are claimed to be Ole Halvorsen and Anne Abrahamsdatter Gjellerud Eie. What do you all make of this? Birth: 30 Mar 1835 Norderhov, Buskerud, Norway Baptism: 5 Jul 1835 Norderhov, Buskerud, Norway https://media.digitalarkivet.no/en/view/8536/42056/300 https://media.digitalarkivet.no/en/view/8530/84912/148 The tree also claims a birth date of 25 Oct 1836 for Ole Halvorsen Malingen in Honefoss, Buskerud, Norway. I was unable to verify or find the record. The father is listed as Hans Christan Hansen Malingen, born 6 Jun 1811 in Leirke, Norderhov, Buskerud, Norway with a death of 2 Aug 1851 in Norway. The mother is listed as Dorthea Olsdatter Halvorsdatter, baptized on 15 Feb 1801 in Norderhov, with a death on 19 Jan 1866 in Hønefoss, Norway (Chicken Falls, Norway). A) What's going on with that double name for the mother and B) what is Chicken Falls? This all needs clearly some cleaning up Best Regards, Simon