double-clicking and clicking maximize window button give differential behavior

[liray-unendlich]

Brief Description:
differential behavior within double-clicking title bar and clicking maximize window button

Operating System (OS and version): Windows 8.1, 7
Phore Marketplace version (shown on About Phore Marketplace page in menu):
Hardware:

Reproducible (Always / Almost Always / Sometimes / Rarely / Couldn't Reproduce):
Always

Steps to reproduce:

1. Double click title bar of phore marketplace application
2. clicking maximize windows button
3. The behavior are differ

Observed Behavior:
The behavior are differ.

Expected Behavior:
the behavior should be same.

Additional info (links, images, etc go here):