Most of these are Wong teasers, although Lumpy did a bit more here. (Great weekend, Lump!)
Wong teasers:
Tease anything -7.5 through -8.5 to get to -1.5 to -2.5, crossing the key numbers of 3 and 7.
Similarly, tease anything +1.5 through +2.5 to get to 7.5 to 8.5, crossing the same key numbers.
You'll notice that a lot of books try to avoid setting lines at 7.5, 8, 8.5 or 1.5, 2, 2.5. Instead you'll see things like -7 +110 and +3 -130.
Teasing through 7 and 10 (like Lumpy did with the +5 and +5.5) is historically not profitable if you do them blindly, since 10 is not as key of a number as 3 and 7. However, it can work better with games that have low totals, and when combined with some handicapping of your own. Getting 11 or 11.5 in a game lined at a total in the mid 30s is pretty solid.
Do NOT tease through zero. It is not profitable long term and is a mistake that I see often. The common square thought is to take a team favored by 3 and tease it so that they are getting 3. NOT profitable long term.
Some people like to tease off of our onto the 3 and the 7 (ex: teasing -9 to -3 or teasing +1 to +7). Not as good since you're not going THROUGH the 3 or the 7, you're just getting on or off of it. But again, when combined with some handicapping of your own, it can work well - I just wouldn't do it blindly.
If you are teasing 2 teams, you should be able to find -110. Teasing 3 teams at +180 is better.
And yes, as you said, if you get a weekend with multiple games that are in teaser range, it can be a very good weekend, as teaser bettors had the last 2 weeks, or a very bad weekend.