Guru Har Rai & 8 Marriages

In Mahan Kosh, On Page 267 the birth date of Guru Har rai is given as 20 Magh (Sudi 12) Samat 1686(26 Feb 1630).

Because of kalgi on forehead this Great Man Bhindrawala(The writer of book) wrote about Guru Har Rai’s 8 marriages as under –
1) Mata Krishan Kaur
2) Mata chand kaur
3) Mata ram kaur
4) Kot Kalyani jee
5) Anokhi Ji
6) Lado Ji
7) Prem Kaur
8) Tokhi Ji

On mahakosh Page 267 Only it is written that – on Harh, sudi 3, samat 1697, with daughters of Daya ram niwasi anoop, bulandshehar, UP.

So birth of guru jee was 20 Magh 1686, and married in Harh 3 samat 1697, which mean he was 11 at the time of married. Bhai Daya Ram was not a king that he had many queens and 8 of his daughters from all and all of 11 years. One Father mom and 8 daughters. If first daughter is of 11 age then, if we keep a difference of one year between them, the youngest of eight must be of age 3-4 years and we also know due to feeding the children the nature says to keep difference of two years.

What Daya Ram got by giving all his young daughters to young guru jee(not even a teenager)? what might be the reason? A matter which we cant even agree with.(remember with spiritual oldness its not true that physical oldness goes on 7th sky). But if some khalsa wrote like this by kicking all gurmat sidhant.

Acc to Mahankosh, Page 1035, Baba Ram Rai born in samat 1703 at Kiratpur and Mahankosh, Page 265, Guru Har Krishan born through Mata Krishen Kaur on 8 sawan badi 10 samat 1713(7 july 1656 at kiratpur). Ram rai was 10 years older then har krishan. So if we declare a single marriage of Guru Har Rai with Mata Krishen Kaur then you cant give any daleel OK