Just watched it again, you're right. Myers came out and skated to the bench but nobody took his place.

I think I know what went wrong. The rule says that when the first of the 3 penalties (Stafford) expires, that guy has to stay in the penalty box until a game break, in order to sustain the 5-3 situation (because the Ott penalty starts when Stafford's expires).
There wasn't a game break between Stafford's and Myers' penalty expiration, so Stafford (although his penalty was expired) was still in the box when Myers left the box.
That's probably why the Sabres bench thought they are still 5-3 (still 2 guys sitting in the penalty box).

This kind of mistakes really shouldn't happen with an experianced coaching staff.
The Leafs announcers had no clue what was going on, they said the Sabres should have gotten another penalty because Myers left early.

The officials are the ones that are supposed to explain that timing to the coaches. IE, when it goes back to 5 on 4 in a delayed penalty situation, because you can't just look over at the box and know how many guys you're supposed to have on the ice.

It's FAR from an 'unbelievable gaffe'. It happens all the time.

The official is supposed tell the coach when it's 5 on 4 because nobody comes out until a stoppage until the penalized team is at full strength, so the 4th players has to come from the bench, and thats the opposite of every other penalty situation.

The officals can't tell the coach how many players he's supposed to have without a game break. It's the coaches responsibilty, the rules are clear. The 2nd penalty guy is allowed to come out when his penalty is expired, since it's back to a normal 5-4.Myers should've just stayed out there.

26.2 Penalty Expiration - When any team shall have three players serving penalties at the same time and because of the delayed penalty rule, a substitute for the third offender is on the ice, none of the three penalized players on the penalty bench may return to the ice until play has stopped. When play has been stopped, the player whose full penalty has expired may return to the ice.
During the play, the Penalty Timekeeper shall permit the return to the ice of the penalized players, in the order of expiry of their penalties, but only when the penalized team is entitled to have more than four players on the ice. Otherwise, these players must wait until the first stoppage of play after the expiration of their penalties in order to be released from the penalty bench.

At 16:24 Stafford's penalty expires, and Ott's starts. It remains 5 on 3, but per 26.2 Stafford cannot leave the box. At 16:45, it becomes 5 on 4 with the expiration of Myers penalty. Again, per 26.2, he still can't leave the box since they were shorthanded, however the Sabres can jump someone off the bench to make it 5 on 4. This is something the officials have to communicate to the coaches.

During the play, the Penalty Timekeeper shall permit the return to the ice of the penalized players, in the order of expiry of their penalties, but only when the penalized team is entitled to have more than four players on the ice.

i have a headache

There wasn't a game break between Stafford's and Myers' penalty expiration, so Stafford (although his penalty was expired) was still in the box when Myers left the box.

Again with the Myers. Did he have a fuck fest with your wives or something?

Have you watched him carry the puck? It's been mind-numbingly awful.

Not... Really...