Add/Drop Issue

I had an issue where I swapped Rush from the free agent list for my xsmithie and it went through fine, however there is only a blank slot here where rush should be: http://prntscr.com/5wdkm2

The main problem is that Rush is not on my roster, but the spot is filled up, in short I can't do any drop/add transactions nor swap in iwilldominate in the starting position. An error says that I have too many members at that position or that I have too many members, something like that.

What Do?

I fixed the problem by droping my aletnative jungler and adding a new one, but I only have 2 subs now and im not allowed to do any other transfers