MLP PgUp/PgDn adjustment issue

[Belinsha]

I have a piece of furniture that uses MPL V2.5 and gives all users the option to adjust their position by starting with the PgUp+PgDn keys together, and then  using arrow and other keys to adjust.

We find that sometimes this works fine, but at other times, when the user tries to adjust after pressing PgUp/PgDn, all that happens is the camera view shifts so that the avatar is out of the field of view (usually below the field of view, I think).  This makes it impossible to actually use the adjustment keys.

The item of furniture contains a README card in its Contents tab, which is simply the instructions for MLP V2.5.  It is headed:

MLPV2 Version 2.5, by Lear Cale, based on MLP - MULTI-LOVE-POSE V1.2 - Copyright (c) 2006, by Miffy Fluffy (BSD License)

However, copying this text into a searchable text editor reveals that it nowhere deals with the mechanism / operation, or even the existence of, the PgUp/PgDn adjustment function.

My two questions then are:

1. Is there something we are overlooking, to prevent this off-camera effect when trying to use this adjustment function?

2. Is there any documentation for MLP which does officially deal with this adjustment function using the PgUp/PgDn keys?

Any help appreciated!