The altitude and speed sound about right, you're definitely suborbital. This means that if you are climbing it's because you have too much lift. If you aren't decellerating much it's because you don't have enough drag. It sounds to me like you are in a low Angle of Attack conventional flight mode rather than a high AoA aerobraking flight mode.
There are two solutions that come to mind:
1. It is possible to re-enter in a low AoA flight mode, but it takes much longer to lose your speed. You should have the controls set to Elvon & nosewheel (not ATM Auto). Use the trim keys (ins and del) to maintain a very slow 10 - 15 m/s descent rate. Keep an eye on the hull temps, and once your velocity is below 3k and the hull temps have dropped engage the airbrake.
2. Use a high AoA re-entry profile like the autopilots do. If you were attempting to to this, you may have had a problem keeping the nose up. If you can't keep the AoA high enough you'll get to much lift and climb. There's a trick to make it possible to hold the high AoA profile - set the controls to Elev & nosewheel, then use [F8] to switch o "glass cockpit" mode. Click on the [ROT] button on the upper left corner of the display, then use [F8] again to return to 2-d panel view. You will now have both airfoils and RCS working together. Just adjust the trim all the way up, and a bit of back stick as needed. Start with about a 40 degree AoA. Watch the VACC to determine the lift you are getting. If VACC is positive pitch up more, and vice versa. Try to maintain about a 80 m/s descent.
Either way, you can also use roll to control your VACC. The higher the roll angle, the more lift is being used to turn the craft and less used to counteract gravity. In short, more roll = lower VACC. An example of this would be the S turns used by the shuttle.
