In the meantime, there is another way you can move through the records.
Just add "&start=xxxx" at the end of the URL in the address bar ("xxxx" is a record number. You will see in the page, the list of the next 500 records starting with the one entered).
Example: The Jacksons start in 6089:
(6088 is a Jackman-Gordon)
To see other surnames (records are alphabetically sorted), there is the need for trial and error in "xxxx")
I hope this may be of help.