Hey mate, some nice looking kits you have there.
Anderlecht's website says that the team use black for their home kit, even though the team themselves use it more as an away kit, and you are right, the team did used to use the white kit as home and they had a purple away kit, which is now the teams third kit I think.
Here are a couple of small errors I have noticed in case you are interested in updating the kits...
Home Kit
The font on the 'rsca.be' is wrong, I have wrote it for you here since I cannot send fonts...
Their is a small logo on the back of the collar, it is the latin banner from Anderlecht's logo...
Maybe it is just me but I think that the Anderlecht logo on the shirt is a bit too small on both home and away.
The black line on the shorts on the right hand side of the 'Fortis' logo should be purple like the rest of the lines on the shirt.
The sock tab with the Anderlecht logo on should have a white background instead of a purple background.
It isn't vital but I think the inside of the collar would look better if it had a black background.
Away Kit
Same 'rsca.be' problem.
You missed a 'Fortis' logo off of the right short.
The whole top of the socks should be purple, no purple band.
Oh and that Liverpool shirt is very fake.