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TPS61222: Vout with high ripple voltage and output offset

Part Number: TPS61222

Hello.

I'm using this IC (TPS61222DCKT) to boost the battery voltage (3.3V to 4.2V) to +5.5V on the output. The idea is to power an LDO regulator for 5V and then power some low power sensors.

The problem is that in the output I have ~300mVpp and a ~6.8Vdc... not even close of 5.5Vdc. 

* The schematic (I have added one more 10uF cap at the output):

https://i.ibb.co/8KRLW90/tps-1.png

* The layout:

https://i.ibb.co/F8q6HL7/tps-2.png

* Vin = 3.95VDC

* Vin AC signal:

https://i.ibb.co/c3kKnnm/SDS00011.png

* V_SW signal:

https://i.ibb.co/KsMM3sR/SDS00012.png

https://i.ibb.co/crJfH74/SDS00013.png

* Output voltage - DC:

https://i.ibb.co/mSRMkcy/SDS00014.png

* Output voltage - AC:

https://i.ibb.co/M8LStDv/SDS00015.png

How can I solve this problem? This does not make me any sense...

Thank you.