Dota – Can’t see the talent tree in the workshop hero build

1. Night Stalker and Enchantress both have 1800 night vision. Here's a sortable complete list of Hero Stats I put together a while ago that has a list of everyone's Night Vision in Dota2. In DotA, Meepo and Slark also both have 1800 night vision.

2. Night Stalker is an exception in that he is the only hero who does NOT see 1800 during the day, seeing only 1200.

3. Enchantress is the only hero in Dota2 right now that has full vision (1800) during both the day and night. In original DotA, Meepo and Slark share this combined 3600 vision.

4. Luna's passive skill Lunar Blessing provides her 1800 vision range during night.

The towers will attack enemies in this order:

1. Closest enemy unit or hero attacking a friendly hero with auto attack
2. Closest enemy unit or hero attacking the tower itself with auto attack
3. Closest enemy unit or hero attacking any friendly unit with auto attack
4. Closest enemy unit
5. Closest enemy hero
6. Closest enemy catapult

The tower will switch targets if:

7. The targeted enemy unit or hero dies
8. An enemy unit or hero targets a friendly hero
9. An enemy hero being attacked by the tower manually attacks a friendly unit or hero (in which case, the tower will select a new target based on the above priority order).

Last one is a weird mechanic that got greatly exploited during last few months,if you get targeted by the tower and click attack button and click on friendly creep the tower will start attacking the next target as if you got out of the attack range.It is getting its popularity since it enables you to attack tower with minimum interruptions(running away+running back from the tower range).To me it looks like a major bug since it makes no sense as a mechanic.

The thing that you mostly experience during the game is that you move inside the tower range (while it is attacking another unit), and then click attack on an enemy hero, which will make the tower attack you.

More discussion here and here.