Is it possible to use HPWM and DT's MIBAM at the same time?

[richard]

For 16F1939 default timer for HPWM1 is Timer1,

Incorrect , timer1 is not an option for hpwm1 ever
timer2 is the default for ccp1 on 16F1939

see CCPTMRS0: PWM TIMER SELECTION CONTROL REGISTER