I'm using Opera 30.0.1835.125 on OpenSUSE 13.1 KDE. Here is a couple of examples:
Where the page counter counts all the way to 58/58, but with an increasing offset, and the last page I can see most of is the 48th page. When the counter reach end, it's not possible to scroll further down.
Where the counter goes to 21/21, but I can't see anything below the header on top of the 18th page.
Excellent question. No answer from anyone means this forum is useless. From what I can work out, Opera Max is also useless for tethered tablets. Please, somebody correct me if I am wrong. I installed it and it did zilch...