Hi Turtle,
HH is right and you may have a problem unless the linseed oil was thoroughly dry before you applied sealer. Permalyn is thinned with mineral spirits and so is linseed oil so they should be compatible. However, if the linseed oil is not dry before covering with sealer, it may never dry and remain soft and mushy feeling. Sealer, which is nothing more than thinned finish, should go on first so it can penetrate the wood as deeply as possible. Your cherry will darken over time. None of those finishes contain UV blockers that can slow that process down.
dave