Moving cursor from "frozen" column right into the unfrozen column, shifts the
displayed unfrozen column to the left-most unfrozen column.

To reproduce:

1) Open sheet w/values, and freeze row/column above/left (e.g., row 1, column A).

2) Shift displayed columns so first unfrozen column (e.g., B) is not visible.

3) With mouse, place cursor in a cell in the rightmost frozen column.

4) With the arrow keys, move cursor right into the unfrozen column.

Display of columns will change so left-most unfrozen column is visible. The
cursor is now in the 1st unfrozen column rather than in the previously-displayed
leftmost unfrozen column. 

This behavior is contrary to other well-known commercial spreadsheet programs,
and contrary to user expectations.