Do you know why amount of ETC and EAC is wrong in Manage Project Forecast?

Summary:

Do you know why amount of ETC and EAC is wrong in Manage Project Forecast?

I created 2 of costs as plan for 1 of task in Project Forecast.

CostA

　ETC 60,000 (10,000 per month)

　EAC60,000 (10,000 per month)

After that, I transfered costs from AP for 2 tasks.

CostA

　Actual cost 15,000

Then EAC was came to change to 95,000.

I thought that amount of EAC is same as Actual Amount(15,000)

And ETCs after August are not appeard.

The overall picture is as follows.

1)Why EAC is 95,000?

2)Why ETCs after August are not appeard?

Please let me know any ideas.

Thanks,

Mayuko