Check your account format setup. There is a field for Display Width, which is designed to resize to fit the segment. You may have an expanded width. Here's from the GP 205 Help screen:
Display Width
Select the display width for each account segment. The display width can be changed at any time and the segment will be resized accordingly.
Use the following guidelines to determine which display width is most appropriate for the segment, depending on the characters and digits that are most likely to be included in the segment.
Standard - 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, F, I, J, L, T, and Z
Expansion 1 - A, B, E, K, P, S, V, X, and Y
Expansion 2 - C, D, G, H, M, N, O, Q, R and U
Expansion 3 - W