API for margin; unconsistent borrowings?

We are currently using Binance api for margin trading where we try to borrow twice amount of our net value in order to short or long BTC. We notice that the system never let us borrow twice as amount. What is even stranger is that one day it can borrow up to 86% percent to long BTC and 13% to short or other way around depending on a day.

We were wondering what could be the cause of this and if this is the way the system supposed to work?

Hello, as this is more about the functionality of the borrow system, I would suggest to contact the Customer Support for more advice/knowledge on this.

fair enough thanks.
Any pointer on where to find them?

There’s online chat on the Binance website (right down corner), or you could also use Binance Chat