IDEA: Trouble with Civ-colours on some units (red instead the real colours)

as the threadtitle says i have trouble with civ-colours of some units.
some units don't show their originated civ-colour but red.

those are some units that i modded in and some original ones that i haven't touched.
pictures ahead:

1st: the longbowman (very nice picture, because there has 1 "man" of one unit the red colour and his 2 mates the original civ-colour.)
http://www.civforum.de/attachment.php?attachmentid=54904

2nd: the workboat. as you can see, it uses a red colour instead of the indian purple
http://www.civforum.de/attachment.php?attachmentid=54905

3rd: the pretorian. the red cross should be roman dark purple
http://www.civforum.de/attachment.php?attachmentid=54909

4th: a modded unit: the bavarian gebirgsjäger. it also uses the red instead of the blue colour
http://www.civforum.de/attachment.php?attachmentid=54907

5th: the knight has a civ-coloured shield, but it is also shown as red instead of the scottish blue
--> attachement picture "ritter.jpg"

as last example 6th: the scotttish higlander uu. also red instead of blue.
---> attachement picture "schwertkämpfer - highlander.jpg"


there are also some more, but i haven't enoug screenies now and i think you also get what bothers me.

but when i place one of this units in worldbuilder the colours are shown as they should. the same counts for the civpedia.
example: gebirgsjäger in civpedia:
http://www.civforum.de/attachment.php?attachmentid=54908


so, my questions: has anyone a similar problem? has anyone an idea how i can solve this?
any help would be appreciated

/edit: threadtitle should be: IDEA?: Trouble with Civ-colours on some units (red instead the real colours).... sry

I think it's a bug with the graphics engine. Don't think there is anything that can be done about it.

hmmm....but what could cause this bug?
hasn't anybody else a similar problem? it isn't a realy gamebalancing problem, but it looks just ugly (if you can say so..)....

I see this problem very often unfortuanately and I hope Firaxis will fix it in a new patch.