All the advice and comments are dead-on accurate, and at the source of a few things keeping me from really enjoying my first-year colony.
I started another post on the pole bending and will start another post on the rotating. Already got great ideas on bending solutions. I've used some (strong) duct tape to stop the post from rotating, but the rack still wants to rotate slightly, taking the pull cable and top pulley around with it. All and all a real aggravation in an otherwise fantastic fourth year (first with nesting).
Yes, I knew that rotation was not a good thing, could even sense/see it in the returning birds last night. It bothered me. That was behind telling the story of how my anchor ASY-M moved one perch closer to stay nearest to me, and looking straight at me.
I have 16 gourds up; opened the last four yesterday afternoon. Yes, in the wind it is a heck of a load even for my round, 2-3/8" S&K Mfg. pole. It will even hold EIGHT more! Not doing that this year. Using the better-designed, angle aluminum S&K rack. Gourds held on with cross members, and quick removal cotter pins. Vinyl sliding inserts for the hole. Really a great design, but the pole is withering under the load.
Love the answers to building nests in multiple gourds; thought that was what was going on but my "landlord worry" had that nagging thought that the rotation thing might somehow be causing it. Went from three years of very little interest to PM competition for housing this year, almost a frenzy at times as they squabble over certain houses . . . love to watch them occasionally steal each others' sticks . . . like they build such a great nest anyway!

My anchor male and his mate have built in three at least . . . and spend the night in three (maybe more) different gourds. I wanna think they really like the pine straw this year . . . until they drag in big, long muddy streamers of "stuff".

Loved ToyinPA's moving eggs story . . . sort of a human cowbird for good!
Thanks for all the first-year congrats. I've tried to implement the advice and good ideas in this Forum; everything just all started to "click" at once this year, with my returning SY-M, now ASY-M, as a strong anchor bird. Usually the last to go to bed, and studiously watches others return at night, clearly BMOC (Big Man On Campus)!
Thanks again.