alright i have acouple of questions and concerns..no bashing please

1. will a rear motor mount musted cause a turbo car to lose boost and bog?

2. is 6800 vtec WAY too high?

Car Mods- 2000 Civic SI b16a2, garret turbo, hks bov, 2 1/2inch dp, 2 1/2inch exhaust (spoon n1) i had the car tuned saturday and during the session on the charts when vtec engaged at 5800 it would lose power but regain it like a really big loss..they retarded my exhaust cam but not the intake cam and raised vtec engagement..could this lead to me bogging durin shifts and goin out of boost? redline is at 8500 as well..anyone have any ideas or do i just need to call these douches and raise hell?