Eye line height can make a big difference . May be better if the seat can be raised so your head hits the roof then moved down a little. Also are you learning on grass or tarmac, with the later there are runway edge cues in you peripheral vision, on grass it is harder. Those that learn on tarmac nearly always bounce on the first grass landing with out the cues. Another trick is get your instructor to fly down the runway in ground effect several times, then you do the same a couple of times can help. Another action I don't agree with is closing the throttle coming over the hedge adds extra work load , bad habit to form if flying higher wing loaded machines they will sink dangerously not good. Fly to the flare close once you have. Can give your instructor a bit of shock, but you will have more control but don't leave it late. One last thing in any training it is normal to have these flat spots, some time it is best to stop have a short break then when you come back it just works. So have fun take heart it will just click one day and landings feel like they last for ever. Remember if you can drive a car down a motorway at 70 with your right ear a foot from the barrier you can land an aircraft.