Regarding your original question, here's my response:
Firstly, your screenshot shows you playing TC = 0. So your Backcount might not be correctly set at +1. Perhaps qfit can answer better regarding this.
Secondly, what seems high? Let's go through each number:
1. Your unit is $150, so your average bet is $297, or about 2 units. Seems reasonable for a 1-6 spread.
2. Your average bet is $297, with a win of $275 per hour, or 1.8 units per hour. Seems reasonable for backcounting and a 1-6 spread.
3. Your standard deviation is $3500 / hour, or 25 units per hour. Now while this may seem high, it isn't, because this takes into account the standard deviation of each count, the $$ you have out at that count, the frequency of each count, and the hands per hour you play at that count. It isn't unreasonably high in terms of units / hour when you remember you aren't flat betting.
4. Your RoR is at 2% based on your overall EV and Var. Seems reasonable