Yes, add pictures but I know the area you are talking about. The idea was to have some of the rib there to support the sheeting hanging off. Now that you have cut it off take a break and clear your head. The secret to model building is when you feel yourself getting frustrated step away for a day or 2 if needed and then come back with a fresh mind. Cut some strips of 1/32" ply as suggested and glue it right on top of your sheeting,over hangingjust enough to meet the flaps whenthey are upthen just blend it in with some filler. Go easy on the sanding now because the sheeting is only 1/16 and it takes no timeto sand through it and poking holes through it now is easy to do at this stage. Use nothing coarser than 220 grit and very light pressure. My first one I glued the wing panels together and had the wrong block under the center to set the dihedral but it flew just fine. I chose to change all my wing sheeting this time around to 3/32" because of the extra strength it provides. Look over this thread by Terry Bolin, he covers the covering process very well as well as lots of good tips.
http://www.rcuniverse.com/forum/m_10...m.htm#10332537 Don't rush, measure twice and cut once, and dry fit before you glue will take you far in modeling. We are all glad to help and there are no dumb questions, only dumb mistakes because we didn't ask first
Your doing good so don't let the little setbacks derail you.