Little problem with... hmm "pin tool" or rigging

Hi guys

I need help and maybe some of you will know the answer to my problem.

PROBLEM:

Even when my puppet is pinned to the floor, every time I want my puppet to bend down to the right, legs get off the floor and also start pointing right. Just like in the screenshots.

[url=https://ifotos.pl/z/qaxxerp/][img]https://s6.ifotos.pl/mini/1jpg_qaxxerp.jpg[/img][/url]

[url=https://ifotos.pl/z/qaxxerh/][img]https://s6.ifotos.pl/mini/2jpg_qaxxerh.jpg[/img][/url]

I tried to play with my puppet's main origin point but without a success. I tried it with and without walk behalvior.
Maybe some of you had a similar problem and found a solution to it?

Here's a link to my puppet (I couldn't attach my puppet to this post):

https://www.sendspace.com/file/wc92gs

Thx in advance.