These two words were in the spam lists. Not being able to write “d-i-g-i-t-a-l” makes it difficult to write some posts. The net result will result just on less posts being made.
I think you should try to remove the spam list altogether. If spam comes, you may remove it manually. If it happens to be overwhelming, then you can put the spam list again; but right now it is a nuance to the normal usage of this forum.