Failure of two pip related to different pituons. What is the reason?

Question

Windows

I have 2 different pip:
py -m pip
and
python -m pip
python - 3.7.4 32 bit (Intel)
py - 3.7.8 64 bit (AMD64)

Installed the selenium module for python a couple of days ago. Today I decided to remove it from "python" and install it for "py". Now I deleted it through python -m pip uninstall selenium- it says that everything was deleted successfully, but in fact I can still connect it, it didn’t even disappear from pip list.
In general, I tinkered with the commands somehow, like I could still delete it. Then, since it's gone, it's time to start installing it for "py": py -m pip install selenium. I check all the pip lists, and he pancake was installed both there and there! What the hell is this?

I forgot to say that even before all this I tried to install selenium for "py" - pip said that everything was installed cool, but in fact it was not in the pip list and I could not connect it.