Personally, I'd just be patient and wait it out...
But if you're eager,
For Sentry, you're able to see what your pay amount will ultimately be after your report's been approved.
For A Closer Look, bonus amount are usually listed in your shop log when you self-assign yourself to an assignment; however, if this was something between you and a scheduler via email, it may not show.
I'd check those two areas first. In the end, you'll get your bonus that was promised (as long as they stay in business, of course!). Even if your checks sent to you are missing the bonus amounts, both Sentry and A Closer Look are easy to deal with via email or call. If that ever happens, just follow up and figure out a solution. What's happened to me with an MSC was that they just added the bonus that was missed to the next assignment I already had scheduled.
Shopping the Greater Denver Area, Colorado Springs and in-between in Colorado. 33 year old male and willing to travel!