Hello @Leon1
Please contact the support team with your problem. If possible include the content of /cache/recovery after having tried a gapps install. From the sounds of it the gapps install is failing but you already have some gapps updates installed. The 1.7 hazelnut release is the correct release. It was a minor updated release compared to 1.6 that will not be pushed to all the phones until we release a combined 1.8 release.