Weird Part Glitch

[TogNK]

I was making a five thruster ship and using the modular girder segment to connect the segments. Three out of four worked fine. When I got to adding the fourth segment to the final side, the fuel tanks were going upside down. Upon further inspection, I noticed that the "spheres" on the end of the girders (that appear when I select the part) were reversed in comparison to the others I was using. Anyone know the problem or how I can fix it?

[Vanamonde]

Pictures always help others diagnose your problems. But since 5 is not a symmetry setting in the game, I'm assuming you placed them by hand? In which case, I suspect you somehow placed some of the girders in an inverted orientation without realizing it. Anyway, why not simply rotate the tanks back the way you want them with the WASD keys? Even better, build one stricture the way you want it, then copy/paste it 4 more times. You can copy an assembly by alt-l.click on its root part.