RE: Lanier Mariner 40 MKII ARF 62"
Yes, that is as it should be. The joiner is not a real tight fit and as you push the joiner in, the epoxy is squeezed up through the gaps around the joiner and extruded out around it. This is the only way to ensure that the ends of the joiner get glued properly to the spars. Needless to say, you have to use an epoxy that will stay liquid long enough to work the joiner in. You can't use 5 minute epoxy to do that. It would begin to set before you could seat the joiner.
Jim