The Gen4 3.6 vehicles have a 5EAT automatic transmission (Non-CVT).
The torque converter in these models can “lock up” at various speeds AND in various gears unlike other torque converters which only lock up in the highest gear at around 50 MPH. This is likely to be the “extra” shifts you are experiencing.
My suggestion is to do a drain and fill of the transmission ensuring that you use Subaru transmission fluid. A drain and fill only replaces around 50% of the fluid BUT you will be surprised how much difference fresh fluid makes to the transmission shifts in the 5EAT transmission.
Be aware that some aftermarket transmission fluids have be known to cause shifting problems which is why the suggestion is to use Subaru fluid.
Seagrass
The torque converter in these models can “lock up” at various speeds AND in various gears unlike other torque converters which only lock up in the highest gear at around 50 MPH. This is likely to be the “extra” shifts you are experiencing.
My suggestion is to do a drain and fill of the transmission ensuring that you use Subaru transmission fluid. A drain and fill only replaces around 50% of the fluid BUT you will be surprised how much difference fresh fluid makes to the transmission shifts in the 5EAT transmission.
Be aware that some aftermarket transmission fluids have be known to cause shifting problems which is why the suggestion is to use Subaru fluid.
Seagrass