Breeding problem with my H. Erectus females…

Hello Pete an Forum members:

I am having breeding problems with my H. Erectus females. I don’t know what I am doing wrong if anything, or if there is something I need to correct proptly. My tank is a 55gal. 2 foot tall rectangular shape that is a 1.5 feet wide by 4.5 feet long. I have an under-sand filter inside covered with de-ammonia, carbon, and de-phosphate poly; then the sand. There is 4 glass pipes that have the under-sand difusers bubbling, and I cut the glass pipe off around 4 inches from the top of the water. In addition to those glass pipes pulling under-toe; I have 2 additional glass pipes. One is routed to a hang-on-back power filter that barely trickles through carbon filters. The other is connected to a power head blowing on my live rock and corals that are compatable with seahorses. My main filter is a Mariland 350 Magnum canister filter that I have placed the intake in the center of the tank where the 2 pieces of under-sand filter crates meet so there won’t be a dead zone there. The out take to it is just above right on top of the water with the head swiveled to blow towards the cornor of the tank to create a circular motion on the top of the water. In addition to that; in that conor where the water is pushing towards, I have placed an over flow skimmer box to emply into my sump tank that is designed for a 100gal. tank. The out flow for it is in the conor pushing water current on around the top of the water. Finally the water current meets up to a 65g Coral Life Pro Venturi Skimmer in the back left hand conor.
Inside the tank there should be plenty of hitching post. I have macros like the shaving brushes, mermaid fans, feather dusters, coco worms, the live rocks, also some sea weeds like the bladder wrack, red and black mangroves, and a "horse hair" like tall artificial looking plant that is soft, waivie, and reaches the top of the water.
Now that you have a mental picture of my tank, there are no disturbing fish in the tank only a mated pair of green dragonet mandarins. They mostly stay hidden in the rock work.
I do have one jealous male erectus that lost his female due to a sea louse infestation earlier in the year. He fights with the males for a while then gives up after a while after he sees that the female isn’t going to give in to him. Then the female will go find her mate or visa versa. After dancing and prominading for a while or even days, it is like they are going to get the deed done and she will dart around and go hitch just before the align and meet. They will dance some more and she will repeat her unusual action. Now this isn’t just one female, but 2. After doing this numerous times she will finally turn to dart away and spill her eggs all over the tank as she is descending. I don’t understand what they are doing. His pouch hole is wide open, pouch streached to the max, and she is protruding so that you would think she is going to grow a new body part. :laugh: A couple of weeks will go by with each pair and the same thing will happen again and again. So far this year it has happened about 10 times each. I will do a clean up and water change in hopes that they will eventually get it. What am I doing wrong? Do I need to change something about the tank? Or are they just young and learning/is it normal for them?
In desperate need of answers, suggestions/help…..

Thanks,
DavidCox1979