1. The "to" option (in the Position section with "Horizontal") in  reads:
"Select the reference point for the selected horizontal alignment option. The following options are available:"
"reference point" should be "region or reference line"
2. The relation between the "Horizontal" option and the "to" option could be explained better by adding the following sentence (after the first sentence) for "Horizontal":
The selection specifies the position of the object relative to the region or reference line selected in the <menuitem>to</menuitem> dropdown list.
Seth Chaiklin committed a patch related to this issue.
It has been pushed to "master":
tdf#154689 clarifications for "to" and "Horizontal