yes its a problem with cios249 rev 20. you should down grade 249 to rev17. overall its better right now, but rev21 which is coming soon will be better than 17. 20 is missing a lot of stuff but gives you more variety.
here is what to do: get the cios38 rev17 installer. run through homebrew channel. then take the wad of cios250 rev20 that is included in the guide and install that. now you will have rev20 in slot 250 and 17 in 249, with 249 being the most commonly used cios.
im not sure, but i think you can use cios 222 to install wads if you want to make it easier.