backtest results calculate not properly ?

[Ytigiev]

Hello, 

I have found that backtest results calculate not properly 
1) Start balance > 100. Why? 
2) First Entry balance < 100. Why?
3) Each new Entry balance doesn't equal previous Exit balance.  Why?

P.S. 
Could you explain on example what does mean - persistence?


Tested data:

binance BTC ETC 2018-08-23 15:46 2018-08-26 07:46 2 days, 16 hours

Strategy: RSI
Candle Size: 1 minutes
Warmup period: 10


interval = 10
[thresholds]
low = 25
high = 70
persistence = 2