Clownfish question

i have had my mated clowns for about 5 months now, male about 2in and female about 4in, about a week ago i found my male had jumped out the back of my tank and passed on .. well today i bought another mated pair of occi clowns and introduced them into my tank around 2pm, male about 2in and female about 3in.. about an hour ago i went to check on them and found the original female and the new male in the anemone together and now they both chase the new famale when she gets close to them so i put her in my sump..as i continued watching them i noticed both the new male and old female doing this little dance, they turn side ways and kinda do a jiggle thing... my confusion is,
1. why is the male doing this with my old bigger female?
2. why is my big female doing this back to the male???
3. why would the male all of a sudden be chasing his female??

sorry for the noob question, just confused...Thanks!!

 

Double post sorry