Place the wireless client and WA854RE next to each other to ensure a more stable connection between them. WA854RE can only be upgraded wirelessly...

The link in the thread you mentioned is for TL-WR841HP V1. But your model is TL-WR1043ND V1?

Your internet service provider checked the line for you? When the telephone line is plugged into the router or your phone ONLY, is it working properly?

Update: Out of curiosity, I tried my brother's iPad Mini version 8.1.2(12B440) but no problem at all. :)Maybe you should update your iPad Mini. Anyway, if there is any update on your side, pls report...

What are you trying to block? Describe in details pls.

I'm afraid not. Why not update your MAC OS? Or you can login its web interface using the method as below. http://www.tp-link.com/en/faq-464.html