That would only apply for CAK-DEN (and DEN-CAK), with also a choice of a movie for $8. The Mexico flight will be free TV since the signal is gone across the border (licensing issues?).

The Akron flights are Tier 1 for food so it is:
Morning - Granola Bar
Mid-day to Evening - Dorritos, Sun Chips, Fritos
Red-Eye - Warm Cookie
(Same, but no cookie for Mexico flights).

Plus $5 for alcoholic drinks. Credit cards only for TV and drinks, no cash.

Frontier's Customer Service line is very good so I would suggest giving them a call about merging two PNRs. Worst case, spend a longer layover at DEN. It is not a bad airport to be stuck at. If you have the time for a good walk, you can head over to the B gates and visit the New Belguim pub. Or stay in A and try one of Chef Jimmy's paninis (the restaurant has a bar).