Breakdown of what's happening. Register has 1 slot left, and I tried to put the deed in the register while on the contents page. This usually works, but not this time. I turned it to the empty page and it went in just fine.

*LOG BELOW*

Currently stored: 49
Maximum: 50
>put deed in reg
But you can't fit any more deeds in a deed register!
>turn reg to page 50
You flip your deed register to page 50.
>read reg
Page 50 is blank.
[Turn the register to CONTENTS to see a full listing.]
>put deed in reg
You place your electrum deed inside a deed register.