How come I can't view certain pins or accounts on Pinterest?

I need help !!!! I have two Pinterest accounts. Now I wanted to switch my pins from my main acc over to my other acc.

The first problem is that I can't see my main Pinterest account on my alt. I'm following my main on my alt and it will not appear for me on my profile??? I even tried to message alt on my main and those messages don't even appear!! It appears for my main but not for my alt.

The second problem is that I cannot view certain pins. Now I'm not sure why because both accs are 18+. I tried to save a pin from my main on my alt and they are not appearing at all? But when I go to my main, those pins I tried to save are visible? But not on my alt

I'm sorry if this is confusing I'm just not sure how to explain this issue !!