262144k fluid storage is hidden nice.
but when you make a pattern for 262m fluid storage from extra disks
and go to your grid or smth and look for it at first it will be 262m part and then it will switch to 262144k part because there are 2 items with the same recipe

this is probably caused because you can use 65536k part from both mods for this recipe
OR
high chance that you just hid it and didnt disable the recipes for the parts of the mod you didnt want