Hey, everyone 
As suggested by the post and the notification you received earlier today, our Stocks & Shares ISA is now officially flexible 
This means that you can withdraw any amount from your ISA and deposit it back without using up your allowance as long as you do it within the same tax year.
The tab should now be displaying the information correctly. If you still see any discrepancies, please send me a private message so I can check the situation further with the team 
You’re right - the repayment always happens after the withdrawal. The definition takes into account that you cannot deposit more than £20,000 during the tax year, hence why the calculation is based on the net deposits per tax year.